The Guru of 3D posted new Forceware 266.77 drivers for Windows Vista and 7. Use them at your own risk.
Download for 64-bit
This driver set was released by eVGA, it supports most series 200, 400 and 500 cards. Currently there's no release notes available however our forums indicate this is a proper and new WHQL set.Download for 32-bit
Download for 64-bit