Facebookphotos 2012 4 21

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Australia man sentenced to jail for posting nude photos of ex-lover on Facebook.

"I'm Voting!" app from Facebook/CNN turns America's traditionally private ballot-casting on its head.

A collage of profile pictures makes up a wall in the break room at the new Facebook Data Center on April 19, 2012 in Forest City, North Carolina.

Rainier Ehrhardt

AFP/Getty Images