NVIDIA has released ForceWare 162.22 official WHQL certified drivers for Windows Vista.

Release Highlights:

-WHQL Certified driver for GeForce 6, 7, and 8 series GPUs.
-This driver supports single GPU and NVIDIA SLI technology on DirectX 9, DirectX 10, and OpenGL.
-Improved compatibility for Lost Planet.
-Added "Resize the HDTV desktop" underscan compensation option
-Numerous game and application compatibility fixes. Please read the release notes for more information on product support, feature limitations, driver fixes and known compatibility issues.

Release notes (.pdf format)

Vista 32-bit | Vista 64-bit

NVIDIA homepage