Get Games has Just Cause 2 and VVVVVV at great prices. I haven't played JC2 but VVVVVV is an awesome, frustrating, casual game.
Just Cause 2 - [LINK] (distribution is via Steam, you will receive a key that is used to add the game to your Steam Library. More detailed instructions are given after your purchase)
VVVVVV - [LINK]
Also, I have been playing Just Dance 2 for Wii all morning. No, I didn't lose a bet. Yes, I really wanted to try the game. Maybe I will put up a vid of me failing hard later.