Wow. There are a lot of interpretations on why this is HUGE - a game changer. In addition to what's been mentioned above, this is the shot across the bow of G

Wow. There are a lot of interpretations on why this is HUGE - a game changer. In addition to what's been mentioned above, this is the shot across the bow of Google. I suspect Google has better search, but their social graph is much worse. (Google+ is only extensively used by their captive audience) The search on Facebook will get better over time, and they have the better social graph. This also gives them a new "neat" factor that will keep people coming back, especially those bored of seeing cat and children photos from long forgotten friends.