The Windows 177.89 Driver is now available, released during Siggraph 2008, enable the latest features including OpenGL 3.0 support. Overall this seems to be a widely supported driver which ahs been showing some good results.

Vista 32-bit
http://downloads.guru3d.com/GeForce-...load-2033.html

Vista 64-bit
http://downloads.guru3d.com/GeForce-...load-2032.html

XP 32-bit
http://downloads.guru3d.com/GeForce-...load-2030.html

XP 64-bit
http://downloads.guru3d.com/GeForce-...load-2031.html