For Sprungy

Burnout Paradise comes out this or next month. Defiantly get that. It's beautifully done, and online, and get to crash a lot.
Get COD4, you won't regret it.
Other than sports games, racing games, and FPS's, there's not many online games you can play anywhere.
There's FFXI and Phantasy Star Online for LIVE. I have FFXI, but haven't played it in a year. MMORPG's.

There's also this game called Dark Messiah, it's like a FPS, but you use spells and swords and stuff. Try out the demo, I though it was fun. Comes out in a month or so as well.