Just thought I'd chime in on the Matchbook love-fest! As one poster said above, their live betting is about the best thing going now, and I plan my nights and weekends around it! Love it! I like to live bet the entire game and then check my total volume after the game. I'm often in the tens of thousands of total action on each live-game. Nothing like a heavy couple hours of trading, and then seeing green on both sides of the market as you head into the fourth quarter!
Also, MB is apparently one of the safest places to have your money. Over the past several months I've extracted over 40K from them, without any problems (they can do checks only up to 3K, but they send several at a time when you take out more). I pay the $28.50 for the FedEx check -- it arrives within 3 or 4 days each time. Too easy!
Kudos to MB! If you don't have an account there, you're hurting yourself. Whether you're a square (plenty on this board), a sharp (plenty on this board), or simply an addict (plenty on this board), there is something at MB for you.
Can't wait for the American Idol markets to open up!!
You can even create markets for your own personal stuff with your buddies (e.g., the golf tournament that your friends are playing next weekend), and after the event is over, you simply tell MB of the results, and they pay everybody. Looks like someone is doing that right now (under X-bets). Fun!