New GeForce Forceware 259.31 Beta drivers are available for Windows XP, Vista, and 7. Use them at your own risk.

The NVIDIA developer site shows a new driver today. Please consider this driver BETA. Windows driver version 259.31 and Linux drivers version 256.38.03 provide full support for OpenGL 4.1 and GLSL 4.10 on capable hardware. This driver also supports several new OpenGL extensions for both 4.1-capable GPUs and older GPUs.

GeForce Forceware 259.31 Win 7 | Vista 64-bit download from Guru3D.com
GeForce Forceware 259.31 Win7 | Vista 32-bit download from Guru3D.com
GeForce Forceware 259.31 Windows XP 32-bit download from Guru3D.com