Is Flickr good for SEO? Can Tumblr drive traffic? If these questions are part of your day-to-day work, hold onto your hats; here's an infographic that's actually useful for a change.

If you're doing any social media marketing, here's something for your to print out and hang up near your desk as a handy point of reference. CMO.com, together with SEO firm 97th Floor, have created this chart showing which social networks are best for various organizational, CRM and marketing goals.

For example, if you need massive pageviews for your site or a client's site, Facebook and Twitter are just so-so for referring their users to your content. If you want to see really big clickthroughs, you should optimize for StumbleUpon and Digg. And if your goal is search engine optimization, don't think that Facebook's "no-follow" links are doing you any favors; instead, focus on Flickr and YouTube to see your desired results on Page One.

When you think about best-in-class social media campaigns and true leaders in social media marketing, you realize that most of the time, creative and successful marketing teams pick a specific platform for a specific reason; this chart gives you the tip of the iceburg when it comes to making the right choice for your own company's or clients' campaigns.

Check out the chart below, and in the comments, let us know about your experiences with marketing, CRM, PR and SEO across these various platforms.

Click image to view full-size PDF version.

Lead image courtesy of Flickr, rishibando.

1811 GMT: Moamer Kadhafi's son Seif al-Islam insists the regime would "never surrender" to the rebels in an interview broadcast on Britain's Sky News and BBC TV.

"This is our country, we will never, ever give up and we will never, ever surrender," says Seif. "We fight here in Libya, we die here in Libya." He adds that the Libyan people "will never, ever welcome NATO, we will never, ever welcome the Americans either."

1804 GMT: Libya's crude oil exports have slowed sharply in the past week and are now significantly below 500,000 barrels per day, the International Energy Agency reports.

1802 GMT: Danish police block plans by activists for a giant party at a Copenhagen-area villa owned by Moamer Kadhafi and his family. Two Danes launched on Facebook an open invitation for the March 25 party at the Kadhafi villa in Gentofte, an upscale suburb north of Copenhagen, and some 3,700 people confirmed their presence via the social networking website.

Demonstrators in London on Wednesday occupied a mansion belonging to Kadhafi's son Seif al-Islam, saying it belonged to the Libyan people.

1758 GMT: In London, Standard & Poors lowers Libya's long-term rating by four notches to 'BB' due to heightened risk, then suspends its ratings due to international sanctions and the inability to obtain reliable information.

-- Bahrain's main opposition group cancels a planned Friday protest march on the royal palace. Plans to march on the palace in a mainly Sunni area of the capital Manama risk provoking clashes between the Shiite majority and the Sunni minority, opposition leaders say.

1751 GMT: The United States moves to shut down Libya's embassy in Washington, staffed by diplomats still loyal to the Kadhafi regime. "We are suspending our relationships with the existing Libyan embassy. So we expect them to end operating as the embassy of Libya," Secretary of State Hillary Clinton tells US lawmakers, stopping short of formally ending diplomatic relations.

The United States evacuated its diplomats and shuttered its embassy in Tripoli after the pro-democracy uprising erupted in Libya in mid-February.

1745 GMT: Three Dutch soldiers captured in a failed attempt to evacuate two civilians by navy helicopter in Libya in late February are to be freed, Libyan state television says. In the Netherlands, foreign ministry spokesman declines to comment on the report, and the Dutch defence ministry is not immediately available for comment.

1739 GMT: Gulf Cooperation Council states will create a $20 billion dollar development fund to aid Bahrain and Oman after protests there calling for sweeping reforms, the oil-rich monarchies say.

1737 GMT: Italy's ENI, the largest foreign energy investor in Libya, says it would only be able to hit its yearly growth target for 2011-2014 if normal production resumes in the strife-torn country.

-- In Rabat, Moroccan King Mohammed VI draws praise at home and from key ally France and Spain for his promise of sweeping reforms. Political parties say his late Wednesday address pledging reform was historic and opens the way for a modern Morocco that could be an example to the Arab world.

1732 GMT: The six Gulf Arab states vow in a statement to deal "decisively" with any threats to the security of any of their members, as calls for reform grow louder in the oil-rich monarchies.

1730 GMT: Egypt's growth rate in 2010-2011 is expected to fall to 3% from an initial forecast of 5.8% if protests continue, Finance Minister Samir Radwan says.

Welcome to Thursday's AFP live report on developments in Libya, as forces loyal to Libyan leader Moamer Kadhafi claim to have seized control of the western town of Zawiyah from rebels.

1727 GMT: Here is a recap of the main recent events:

-- Rebels flee the key oil hub of Ras Lanuf after relentless artillery pounding and air strikes from Kadhafi's forces.

-- In the west, an intense battle for control of Zawiyah, some 50 kilometres west of Tripoli, ends in victory for Kadhafi's forces.

-- A source close to Nicolas Sarkozy says the French president will propose "targeted air strikes" in Libya. NATO chief Anders Fogh Rasmussen says the alliance stands ready to act if there is a clear mandate.

-- The director of US national intelligence, James Clapper, describes Libya's air defence structure as "quite substantial."

Elsewhere in Middle East news:

-- US Secretary of State Hillary Clinton says she will visit Egypt and Tunisia next week, her first trip to those countries since their presidents were deposed after mass protests.

-- Foreign ministers of the six Gulf Arab states meet in Saudi Arabia to discuss the fighting in Libya and political unrest in member-states Bahrain and Oman.

-- Egypt's new interior minister vows that private telephones will no longer be tapped.

-- In his first message to the new military rulers in Cairo, Syrian President Bashar al-Assad says his country is ready to "cooperate" with Egypt.

-- After a month of violent protests Yemeni President Ali Abdullah Saleh pledges to devolve power to parliament, a move the opposition swiftly rejects as too late.

Investors, perhaps nudged by the pending release of Apple's camera-riffic iPad 2, now see the promise in DailyBooth; Ignition Partners and Sequoia Capital together ponied up $6 million to back the two-year old startup.

DailyBooth tests the theory that teens and photo-sharing go hand-in-hand -- or face-to-face. The web and mobile service encourages its (mostly) youthful members to share photos of their faces on a daily basis in a process known as "boothing."

DailyBooth, a teenager in its own right when compared to mobile photo sharing upstarts Instagram and Picplz, has spawned more than 14 million photos, a.k.a "booths", from members using front-facing cameras and is now better positioned to face its new, fast-growing competitors.

“We believe DailyBooth is uniquely positioned as a platform to harness the distribution and engagement potential of the front-facing camera," says Ignition Partners' Chris Howard, who will join the startup's Board of Directors. "After using the site regularly, we see DailyBooth as a new form of social communication, and our firm is thrilled to be contributing to the growth of one of the web’s most interesting communities.”

This is DailyBooth's first sizable round of financing. The Y Combinator alum startup had previously raised $1 million in angel funding from Kevin Rose, Betaworks, SV Angel, Sequoia Capital, Chis Sacca and other notable angels.

That was fast. Apple released its iOS 4.3 update for iDevices on Wednesday in preparation for today’s iPad 2 launch… and it is already jailbroken. User xpl0n1c uploaded a video to YouTube yesterday showing an iPad with the new system update installed running on an untethered jailbreak, which means that it can be rebooted without first being connected — tethered — to a computer and re-jailbroken.

Is this surprising? Not at all. The beta version of iOS 4.3 has been available to developers for some time now. There’s no public release of this jailbreak yet however, simply proof that it is running. With that key hurdle passed, it is now only a matter of time.

This YouTube posting doesn’t come from one of the usual jailbreak suspects, so there’s no blog or Twitter account to turn to for information about a future release. The video’s poster notes that the jailbreak shown is in its alpha phase, “because not all required kernel patches are in it yet.”

The practice of jailbreaking has become increasingly popular since a federal court ruled last year that it is perfectly legal. The chief advantage of a jailbreak is breaking free of the content restrictions that Apple places on App Store release. For example, one app available on Cydia — the jailbreak equivalent of the App Store — called MyWi allows your iDevice to be turned into a Wi-Fi hotspot. iOS 4.3 adds support for this natively of course, but the jailbreak app is a one-time payment of $19.99, versus the monthly fees associated with official Personal Hotspots on AT&T or Verizon. The danger to the end-user is also relatively minimal thanks to Apple’s System Restore feature, which returns the device to its factory settings.

CAPE CANAVERAL, Fla. – Its decades-long mission accomplished, space shuttle Discovery headed home to retirement after undocking from the International Space Station on Monday for the last time.

The world's most-flown spaceship got a dramatic send-off by "Star Trek's" original Capt. Kirk.

"Space, the final frontier," actor William Shatner proclaimed in a prerecorded tribute. "These have been the voyages of the space shuttle Discovery. Her 30-year mission: to seek out new science, to build new outposts, to bring nations together on the final frontier, to boldly go and do what no spacecraft has done before."

On the final leg of its final journey — due to culminate with a Wednesday touchdown — Discovery performed a victory lap around the space station immediately after undocking. The shuttle and station crews beamed down pictures of each other's vessel, with the blue cloud-specked planet 220 miles below as the stunning backdrop.

NASA TV showed live footage of Discovery as it soared over the Atlantic Ocean and the Sahara desert, and in a matter of a few minutes, over the Mediterranean Sea and northern Italy. The breathtaking shots were captured by the space station crew.

"It looks beautiful," observed Scott Kelly, the space station's skipper. He wished the six shuttle passengers a safe ride home.

To ensure safe passage, the shuttle astronauts pulled out their 100-foot, laser-tipped inspection boom and checked their ship for any signs of micrometeorite damage. The safety procedure was put in place following the 2003 Columbia disaster.

Discovery is being sent to the Smithsonian Institution for display after it undergoes several months of decommissioning. NASA's two other shuttles will join Discovery in retirement, following their upcoming missions.

The oldest of NASA's surviving shuttles, Discovery will have racked up nearly 150 million miles by trip's end, accumulated more than 39 missions in nearly 27 years and spent 365 days total in space. It flew to the International Space Station 13 times and made the first shuttle rendezvous with Russia's Mir station in 1995.

Discovery first flew in 1984 and carried the Hubble Space Telescope to orbit six years later. It's flown 184 astronauts, including John Glenn at age 77 in 1998.

Shatner's message was played for the shuttle crew Monday morning, just a few hours before the undocking. His words were followed by the wake-up music, "Theme from Star Trek." It was the runner-up in a contest sponsored by NASA to mark the end of the shuttle program. The No. 1 vote-getter — "Blue Sky" by Big Head Todd and the Monsters — will be beamed up as Tuesday's wake-up tune.

Mission Control and Discovery's astronauts also paid homage to lead shuttle flight director Bryan Lunney, who is quitting NASA as the program draws to a close. His voice cracked as he bid farewell, and he received a standing ovation in the control room.

"It's been a hoot," Lunney told the astronauts. "Couldn't have had a better choice for my last flight."

Shuttle commander Steven Lindsey said he'd rather be celebrating with Lunney than inspecting his ship.

Lunney was joined earlier in Mission Control by his father, legendary Apollo flight director Glynn Lunney. The younger Lunney is leaving NASA later this month after 22 years and nearly 50 shuttle flights to join a pair of aerospace research companies.

During their 13-day flight, Lindsey and his crew delivered a new storage compartment, as well as an equipment platform and the first humanoid robot in space called R2, which is short for Robonaut 2. Both large items were successfully installed, but R2 will be unpacked by the station crew in the coming weeks.

"If I were unpacked, I would wave goodbye!" R2 said in a Twitter message that was posted by a human on the ground.

The addition of the 21-foot-long, 15-foot wide storage compartment left the space station 97 percent complete. The complex now has a mass of nearly 1 million pounds.

Kenneth Todd, a space station manager, described the completed mission as "above and beyond." He said it was bittersweet to see Discovery for the last time in orbit. "We bid her adieu and certainly godspeed to Steve and the rest of the crew on the way home."

On the next shuttle flight, by Endeavour next month, a $2 billion physics experiment will be installed on the outside of the space station. Atlantis will blast off with supplies on the final shuttle mission at the end of June.

NASA is under presidential direction to focus more on outer space, beginning with expeditions to asteroids and then Mars.

American astronauts will continue hitching rides to the space station on Russian Soyuz spacecraft, at great expense. The intent is for private U.S companies to take over those ferry operations within a few years.

___

Online:

NASA: http://www.nasa.gov/mission_pages/shuttle/main/index.html

WASHINGTON (AFP) – A US judge ordered Twitter to hand over data of three users in contact with the controversial website WikiLeaks, rejecting arguments the move violated freedom of speech and privacy.

President Barack Obama's administration obtained a court order last year seeking information from the Twitter accounts as it considers action against WikiLeaks, which has released a flood of secret diplomatic documents.

One of the accounts belongs to an Icelandic lawmaker, Birgitta Jonsdottir. Iceland's foreign ministry in January summoned the US ambassador to express "serious concern" about the Twitter order.

Magistrate Judge Theresa Buchanan, based in the Washington suburb of Alexandria, Virginia, rejected the argument made by the three Twitter users' that the order would have a "chilling effect" on freedom of speech.

"The Twitter order does not seek to control or direct the content of petitioners' speech or association," she wrote.

She said the three "already made their Twitter posts and associations publicly available" and voluntarily provided information to Twitter pursuant to the website's privacy policy.

Buchanan also dismissed the argument that the order violated the Fourth Amendment to the US Constitution, which protects people against "unreasonable" searches.

When the trio relayed information to Twitter, they gave up "any reasonable expectation of privacy," she said.

WikiLeaks, which has strongly criticized the order, said that three Twitter users never worked for the site but that two helped make public a video that showed a 2007 US helicopter strike in Baghdad that killed several people.

The footage appeared to show the Apache pilots mistaking a camera carried by an employee of the Reuters news agency as a rocket-propelled grenade launcher.

WikiLeaks has since angered US authorities by posting secret documents on the wars in Afghanistan and Iraq and releasing a slew of internal correspondence among US diplomats around the world.

Aden Fine of the American Civil Liberties Union, the rights advocacy group which defended the Twitter users, said they planned to appeal.

"This is not the last word," Fine said.

"This decision gives the government the ability to obtain private information about Internet communication in secret, except in extraordinary circumstances," he said.

"That's not how our judicial system works and it shouldn't have been permitted here," he said.

Fine said the Twitter users planned to take the case to a district judge. Buchanan is a magistrate, a type of legal officer who generally helps courts prepare for trials.

Cindy Cohn, legal director of the Electronic Frontier Foundation which also backed the legal challenge, said that in an era in which third parties hold so much digital information, "the government can track your every move and statement without you ever having a chance to protect yourself."

Besides Jonsdottir, the Twitter accounts belong to US computer researcher Jacob Appelbaum and Rop Gonggrijp, a Dutch volunteer for WikiLeaks.

Buchanan rejected calls to drop the order in light of Jonsdottir's position as a foreign lawmaker.

The order "does not seek information on parliamentary affairs in Iceland, or any of Ms. Jonsdottir's parliamentary acts. Her status as a member of parliament is merely incidental to this investigation," she wrote.

The decision came amid growing controversy over the conditions in custody of Bradley Manning, 23, the soldier suspected of releasing the data to WikiLeaks.

In a letter released Thursday, Manning said that he was treated improperly at the Quantico military base in Virginia, including being stripped at night.

The State Department's chief spokesman, Philip Crowley, was quoted as telling a forum at the Massachusetts Institute of Technology that the treatment of Manning was "ridiculous and counterproductive and stupid."

Obama told reporters he had inquired about Manning's treatment and that the Pentagon assured him it was "appropriate."

Rovio, the company behind the popular multi-platform game Angry Birds, has raised an impressive $42 million in a funding round from Accel Partners, Atomico and Felicis Ventures, GigaOM reports.

Skype co-founder Niklas Zennström, who founded the VC firm Atomico, will be joining Rovio’s board.

Starting out as a simple iPhone game, Angry Birds has become a huge franchise that's been spreading in all directions: other platforms, Facebook, toy production, and there are even plans to turn the theme into an animated series.

Rovio said it has sold 2 million plush toys, and in December 2010 the mobile version of Angry Birds has been downloaded 42 million times, with 25% of those downloads being paid.

[via GigaOM]