There have been a fair few problems of late with suspend/resume in the nvidia driver, so I thought I'd put up a little impetus to get things working. I announce: the NVIDIA Linux suspend/resume bounty!
The rules are described in depth on that page, but if you have any questions, feel free to contact me. The basics of it state that you have to bring the system up with AGP accel, run glxgears, exit glxgears, suspend, resume (maintaining X session continuity), run glxgears again, exit glxgears, power down. Up for the challenge? Bring it on...
As a note, in my opinion this isn't really about the money, although of course I'll be giving it to whoever wins! So if you have a solution that I can reproduce here, feel free to send it to me and I'll award you with whatever I have thus far. This is also not a competition... feel free to share information.
Best of luck,