It's coming on PS3 too, but in a recent interview, Kojima seemed like he didn't even want the game to release. Seems like his heart isn't in this one, and I really don't think it'll live up to it's name honestly. I can post the link if someone wants me to, but I can't right now.
Overall though, solid keynote for M$. None of the exclusives made me want to buy a 360 though.