NVIDIA has released ForceWare 158.22 drivers for use with Windows 2000/XP/MCE/64-bit.

Release Highlights:

-Updated May 2, 2007 12 PM PST: The original U.S. English driver kit has been repalced with a new kit to workaround some installation problems. If you had problems with the orignal kit, please download the new one.
-Add support for GeForce 8800 Ultra.
-Increased performance in 3D applications.
-Numerous game and application compatibility fixes.
-Microsoft DirectX 9.0c and OpenGL 2.1 support.
-Please read the release notes for more information on product support, feature limitations, and known compatibility issues.

Release notes (.pdf format)

2000/XP/MCE | 64-bit

NVIDIA homepage