From Penny Arcade:
Also: free online poker for Xbox Live Arcade, in addition to (wait forit) Uno, which as a social card game could actually be a pretty good match for the service. Games of skill and chance can bring a person's inner bastard to the fore, but I know of no other game that can turn a person into a complete fucker in the way that Uno does.
Uno over Live with a headset? I can see it now...
I can't wait!