Well three actually since I still don't own an Xbox360. I'm just buying some 360 games in advance.
Steambot Chronicles ($40) doesn't pretend to be the next Final Fantasy but it defnitely looks like a lot of fun.
Rogue Trooper($30) looks interesting and most people that already have the game say that it is awesome.
Jaws ($10 w/ store credit) is a game that I just had to have in my collection regardless of how cheesy or bad it may be. I'm sure GS will flop it but I'm having a blast with it so far.
Rockstar Presents Table Tennis ($40) I think this will become a cult hit and then everyone is going to try and hunt for a copy. I've always liked ping pong and was very good at it while I was in high school. Despite not having a career mode, it stills looks like a lot of fun.