Spaceteam is great, I played that quite a bit with a friend of mine. If not in the same room though, you're out of luck.
Draw Something, FIFA 13, Modern Combat (I think it's that one...I played one with online deathmatch, it took some getting used to but wasn't that bad).
Modern Combat? I had heard of that as a PC game, but never before as a mobile game. I'll check it out.
Any asynchronous multiplayer games you might recommend?