NVIDIA has released a new series 258 drivers, this is revision 258.19 which carries support for a large amount of GeForce graphics cards.
The 258.19 driver includes the PhysX system software, the HD audio 18.104.22.168 driver, and has support for GeForce 6, 7, 8, 9, 100, 200, 300 and 400 (GTX 465 too) series desktop cards, and the ION GPUs.
A specific change log will follow later on. We have a discussion thread open on these drivers right here.
Have you read our GeForce GTX 480 Quad SLI review already ?