I can say that these drivers support the 8800 very well. There is one issue with getting them installed (at least for me). I had to run these commands after downloading the package:
After this the nvidia module installed without a problem. I also needed these package installed (for Ubuntu):
sudo sh NVIDIA-Linux-x86_64-1.0-9742-pkg2.run -x
sudo vi conftest.sh # On line 350, change the "==" to "="
Not sure if each of the above is absolutely required, but the nvidia install failed before I installed these packages (all at once). I have to say that Quake4 looks awesome... I've never seen a game as good as what this game looks like on this setup. I'm looking forward to Quake Wars .