Video games. Considering the lineup of triple-A titles coming out, you should have no problem spending it. Rock Band package, Assassin's Creed, and Mass Effect, and you're already down to $10.
I did pick up COD4 which simply rocks, anyone who has played the AC-130 level knows what I am talking about. Mass Effect isn't for another 2 weeks, AC is a rental imo. Rock Band is too much for me to buy, let some other sap buy one and I'll come over and play it.