My understanding is that it's sort of a grey area in the law right now--it's possible that the Internet Gambling Act Enforcement of 2006 sort of affects on-line poker and sort of doesn't, but ultimately is one of those things that higher courts haven't yet addressed because it's too new. I think, though, that if there were consequences for anyone, it would be for the people running the site, not the people playing there. So I guess that makes it quasi-legal to play poker for money.