With the release of NVIDIA's new flagship GPU - the GeForce GTX580 - they've been kind enough to release some WHQL drivers to go with it, enter 262.99 Forceware drivers.
The 262.99 release is available for Windows XP, Vista and 7 based systems in both 32 and 64-bit flavors.
Release notes for this set of drivers are:
This is a WHQL-certified driver for the new GeForce GTX 580 GPU.
Installs HD Audio driver to version 188.8.131.52.
Includes PhysX System Software to version 9.10.0514.
Supports OpenCL 1.0 (Open Computing Language) for all GeForce 8-series and later GPUs.
Supports OpenGL 4.1 for GeForce 400 series and later GPUs.
Supports GPU overclocking and temperature monitoring by installing NVIDIA System Tools software.
Users without US English operating systems can select their language and download the International driver here.
GeForce 500 series: GTX 580
You can grab them here!