Dirt 2 Sale

Dirt 2 is Steam's game of the weekend.  At 50% off, for any rally racing fans, it is definitely a must have.

Zero Gear, the other racing game, is free for the weekend.  Try it if you like it though I won't recommend it.  I played a total of 10 minutes on this game and said, I'd rather play Mario Kart on an emulator.

Gamersgate has a AGEOD games sale.  These are those strategy games about the American Civil War and such.  I haven't tried any of those though they are quite expensive, half price is around $25 - a lot for me.

Impulse has sales on Company of Heroes Gold, AI War, Aztaka and Mr. Robot so check those out at this page.