I'm really glad I asked this question because I've learned a great deal from the replies and only been called a paranoid troll once or so lol...
In case I wasn't clear, I'm happy for the young successful players and wish them nothing but continued success. I was interested in the mechanics of the whole thing and I now understand a great deal more about that and about the 2+2 connection and how valuable that can be.
Regarding the legal side, I will provide at least one link:
http://casinogambling.about.com/b/a/256597.htm
Those guys probably didn't expect to be arrested. Yes, that's different because they are involved in sports betting but my point is at least somewhat valid and I'm not just randomly saying the government is evil or anything. Fact is the US has taken direct action against online gambling in the last few months. If you want to stick your head in the sand and refuse to notice what is going on, ok then. Feel free to call me all the names you like. I won't get into an argument about how law enforcement and/or the government works - I'm done replying regarding that aspect.
Thanks a TON for all the informative replies here! I'm very glad to be a part of such a great, helpful group of poeple.