A new report shows Facebook is struggling to maintain dominance in the booming mobile app market.

After a four-month investigation, Facebook gets permission to swallow up mobile photo giant.

Mobile image sharing service Instagram moves closer to the desktop with a host of new interactive features.

Perhaps the biggest news in social media this week was Facebook’s one billion dollar purchase of Instagram.

The photo-sharing app added 2 million users in the past month and is set to overtake Foursquare in 2012.