nVidia has just released a new set of 64-bit drivers - for Windows 7x64, but
probably for other 64-bit OS's as well.
From their web site:-
This is a WHQL-certified driver for GeForce 6, 7, 8, 9, 100, and 200-series
desktop GPUs and ION desktop GPUs.
New in Version 195.62
* Adds GPU-acceleration for smoother online HD videos with the new Adobe
Flash 10.1 beta. Learn more here.
* Adds support for GeForce GT 240.
* Adds support for OpenCL 1.0 (Open Computing Language) for all GeForce
8-series and later GPUs.
* Adds support for CUDA Toolkit 3.0 features and performance
enhancements. See CUDA Zone for more details.
* Adds SLI and multi-GPU support for many top new gaming titles
including Borderlands, Call of Duty: Modern Warfare 2, FIFA Soccer 10, and
more.
* Includes numerous bug fixes including improved performance for Need
for Speed: Shift. Refer to the release notes on the documentation tab for
information about the key bug fixes in this release.
http://www.nvidia.com/Download/index.aspx?lang=en-us