Over at the NVidia site you can find new ForceWare drivers for 32-bit and 64-bit versions of Windows Vista, adding support for newly released GeForce 8x00 GS/GT/GTS videocards. According to release notes, there are fixes for games like Oblivion, Warhammer 40K: Dawn of War, Serious Sam 2 and Dark Messiah of Might & Magic among others.