NV driver is not for someone who spent 500$ on nvidia hardware.
I have 2 brand new video cards I would love to use to their full potential with my new LCDs, and have a great experience with composite UI, but I cant.
Please get XRandR 1.2 into the drivers... I couldn't possibly imagine why its taking so long ?
If you open source your driver, or a part of it... I am sure the open source community would love to give you a hand, and will be loyal to nvidia.