This image taken from twitpic.com shows a photo posted by a group Twitter from Teheran University and captioned "MirHossein Supporter." The US government took the unusual step of asking Twitter to delay a planned maintenance outage because of its use as a communications tool by Iranians following their disputed election, a senior official said June 16, 2009. The request highlighted the US President Barack Obama administration's Web-savvy and the power of social networks such as Twitter and Facebook in organizing protests over the election results in the face of a ban by Iranian authorities on other media. Getty Images logo Getty Images 6 months ago

This image taken from twitpic.com shows a photo posted by a group Twitter from Teheran University and captioned "MirHossein Supporter." The US government took the unusual step of asking Twitter to delay a planned maintenance outage because of its use as a communications tool by Iranians following their disputed election, a senior official said June 16, 2009. The request highlighted the US President Barack Obama administration's Web-savvy and the power of social networks such as Twitter and Facebook in organizing protests over the election results in the face of a ban by Iranian authorities on other media.

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  1. Twitter co-founder Biz Stone gestures as he poses for photographers at the start of the Twitter Conference LA in Los Angeles on September 22, 2009. Twitter, the micro-blogging platform which has attracted tens of millions of users but has yet to make money, has changed its terms to potentially open up the free service to advertisers. Twitter, which allows users to pepper one another with messages of 140 characters or less, has seen explosive growth since it launched publicly in August 2006 but has been unable so far to generate revenue.
  2. Twitter co-founder Biz Stone jokingly 'Tweets' as he poses for photographers at the start of the Twitter Conference LA in Los Angeles on September 22, 2009. Twitter, the micro-blogging platform which has attracted tens of millions of users but has yet to make money, has changed its terms to potentially open up the free service to advertisers. Twitter, which allows users to pepper one another with messages of 140 characters or less, has seen explosive growth since it launched publicly in August 2006 but has been unable so far to generate revenue.
  3. Twitter co-founder Biz Stone is interviewed during the Twitter Conference LA in Los Angeles on September 22, 2009. Twitter, the micro-blogging platform which has attracted tens of millions of users but has yet to make money, has changed its terms to potentially open up the free service to advertisers. Twitter, which allows users to pepper one another with messages of 140 characters or less, has seen explosive growth since it launched publicly in August 2006 but has been unable so far to generate revenue.
  4. Twitter co-founder Biz Stone poses for photographers at the start of the Twitter Conference LA in Los Angeles on September 22, 2009. Twitter, the micro-blogging platform which has attracted tens of millions of users but has yet to make money, has changed its terms to potentially open up the free service to advertisers. Twitter, which allows users to pepper one another with messages of 140 characters or less, has seen explosive growth since it launched publicly in August 2006 but has been unable so far to generate revenue.
  5. Delegates at the Twitter Conference LA in Los Angeles on September 22, 2009. Twitter, the micro-blogging platform which has attracted tens of millions of users but has yet to make money, has changed its terms to potentially open up the free service to advertisers. Twitter, which allows users to pepper one another with messages of 140 characters or less, has seen explosive growth since it launched publicly in August 2006 but has been unable so far to generate revenue.
  6. Delegates at the Twitter Conference LA in Los Angeles on September 22, 2009. Twitter, the micro-blogging platform which has attracted tens of millions of users but has yet to make money, has changed its terms to potentially open up the free service to advertisers. Twitter, which allows users to pepper one another with messages of 140 characters or less, has seen explosive growth since it launched publicly in August 2006 but has been unable so far to generate revenue.
  7. Indonesian activists wear masks featuring US President Barrack Obama (L), Indonesian President Susilo Bambang Yudhoyono (2nd L), President of the European Commission Jose Manuel Barroso(2nd R) and Australian Prime Minister Kevin Rudd during a protest against biodiversity offset programs, in Jakarta on November 18, 2009. Scores of environment activists held a protest against the program of biodiversity offset as they believed that biodiversity offsets are conservation activities intended to compensate for the residual, unavoidable harm to biodiversity caused by development projects, and is not the real solution and will ruin ecological dignity of developing countries.
  8. OREM, UT - NOVEMBER 16: In this photo illustration, a copy of Sarah Palin's book 'Going Rogue' sits on end on a display in the back room of a Costco November 16, 2009 in Orem, Utah. The Orem Costco received between 800-900 copies of the book which will go on sale tomorrow.
  9. OREM, UT - NOVEMBER 16: Gary Haynes (R) and Matt Cross (L) open boxes of Sarah Palin's book 'Going Rogue' as other books sit on a display in the back room of a Costco November 16, 2009 in Orem, Utah. The Orem Costco received between 800-900 copies of the book which will go on sale tomorrow.
  10. OREM, UT - NOVEMBER 16: Matt Cross (R) puts copies of Sarah Palin's book 'Going Rogue' on a display in the back room of a Costco November 16, 2009 in Orem, Utah. The Orem Costco received between 800-900 copies of the book which will go on sale tomorrow.
  11. OREM, UT - NOVEMBER 16: Gary Haynes (R) and Matt Cross (L) put copies of Sarah Palin's book 'Going Rogue' on a display in the back room of a Costco November 16, 2009 in Orem, Utah. The Orem Costco received between 800-900 copies of the book which will go on sale tomorrow.
  12. OREM, UT - NOVEMBER 16: Gary Haynes (R) and Matt Cross (L) put copies of Sarah Palin's book 'Going Rogue' on a display in the back room of a Costco November 16, 2009 in Orem, Utah. The Orem Costco received between 800-900 copies of the book which will go on sale tomorrow.
  13. FILE - In this Oct. 15, 2009 file photo, participants in Twitter, Inc.'s special event to launch a Japan-based mobile version of the popular microblogging service display Twitter pages in Tokyo. In the last decade, first-generation social networks, little more than online address books, gave way to sites such as Facebook and Twitter, where we add our words, photos, links and video posts to a collective stream of consciousness.
  14. A coffee vendor rides past the statue of U.S. President Barack Obama as 10-year-old boy at Menteng Park in Jakarta, Indonesia, Tuesday, Dec. 15, 2009. The statue has been targeted in a Facebook campaign by thousands who say it should be removed.
  15. The mark Brand Introduces Digital Social Selling Application that for the First Time Connects Shoppers with Representatives on Facebook.
  16. Quelf: Obey the Card - film and share Quelf videos with friends on Facebook and Twitter.

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