Richard Jones' Log: Little Big Planet
I'm about as excited about this game as I've been about any game for a loong time. Not only does it look gorgeous, but the potential for emergent gameplay, sharing, collaborative fun, creativity, etc. etc. are enormous. Also, look how darned cute it is!!!
Almost everyone in the office wants to play it, right now, and that even goes for the couple of people who don't play video games :)