There's a new NVIDIA GeForce driver out on the loose and it's in fact 186.21. The driver is available for Windows Vista and Windows 7 64-bit.
Very little is known about this driver but we need to stress that the original .inf file shows it was targeted at Mobile solutions. We replaced the index with a modified .inf files (courtesy of laptopvideo2go) making the driver compatible with all current GeForce cards..
These drivers are to be considered very beta and thus treated as such. You install them at your own risk, don't complain to us or NVIDIA if they do not work out for you. We have a discussion thread open on these drivers right here.
Have you read our GeForce GTX 295 single PCB review already?