“The new open graph apps are all about self expression and serendipity, " Facebook Chief Technical Officer Bret Taylor said in today's keynote.

Today’s event was a noticeably splashier event than recent Facebook developer's conferences. There seemed to be a buzz in the air about the growing battle between Facebook and Google+, which some are already calling the biggest corporate rivalry of this decade. The event was held at the San Francisco Design Center, and the large hall was nearly full, mostly with Facebook developers and media.

Google earlier this week announced that its Google+ service, which had been in trial mode, is now open to the general public. It also announced a to existing features.

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