Not only that, but the US government is basically going to have to make the argument that gambling with fake money is somehow illegal, and if that's the case, well, they better go after all of those online MMORPG's that have ways players can gamble fake money.
This is a very good point; however I don't really want to be the one to test that in the courts

My guess is that they would start looking at the income (my income) and having me justify it or seize that, saying that it was part of a criminal enterprise.