While Diablo 3 doesn't arrive, how about getting your Windows 7 in the mood while you wait for its launch?
Texture visualization and creation utility for GTA San Andreas.

Play classics like Doom, Heretic and Hexen to the fullest.
Modification for Quake III that impresses
Bet on various sports events with the official Bet365 app.
If offline GTA: San Andreas is already fun, then imagine playing against your friends or other players around the world.