There's a new Humble Indie Bundle on sale.
http://www.humblebundle.com/
Quite some good games imo and for a price you can determine yourself and supports charity to boot!
I haven't played the no3 bundle games yet but I hear VVVvvv, Atom zombie smasher are really good. Dunno about Cogs but it looks fun too, Furiey owns it, maybe she can say something sensible about it
If you spent more than the average gifted amount you get the games from bundle 2 as well. I have that bundle and played most games
Machinarium: awesome point & click puzzle adventure. I even finished this game and that rarely happens.
Braid: Nice puzzle platformer with really good graphics.
Revenge of the Titans: Tower defense game. Have only played it a bit but I thought it was pretty ok. Appears to have a pretty steep difficulty curve though when you get to the higher levels.
Osmos: Originally designed for Ipad and touch screen controls. It didn't really appeal to me that much though, maybe with touch controls it's good, on pc I've seen a lot more interesting games.