WHQL versions have been released:
This is the “official” beta graphics driver for the brand new GeForce GTX 460. This supports also all previous GeForce (GeForce 6, 7, 8, 9, 100, 200, 300, and 400-series desktop GPUs as well as ION desktop GPUs). R258.96 automatically install PhysX 9.10.0224 runtimes. R258.96 is an OpenGL 4.0 driver.
In the OpenGL side, R258.96 exposes 233 extensions for a GTX 480 under Win7 64-bit. Compared to R257.15, R256.96 re-adds this extension which, actually, is not a new extension:
WGL_NVX_DX_interop can be used for an OpenGL video player with the video decoding performed by DirectX.