Nvidia has released new OpenGL 4.1 drivers.
http://developer.nvidia.com/object/opengl_driver.html
"WHQL-certified Windows driver version 259.09 and Linux drivers version 256.38.02 provide full support for OpenGL 4.1 and GLSL 4.10."
NVIDIA Releases ForceWare 259.09 Drivers For OpenGL 4.1
Re: NVIDIA Releases ForceWare 259.09 Drivers For OpenGL 4.1
I was planning on getting hold of one of these, this comming september.