Thanks for the tips so far... I'm at work or I'd post my entire XF86Config, but it's pretty standard. I explicitly have it use Nvidia's AGP handler with Option "NvAGP" "1".
I don't know if NVdriver is being passed "NVreg_EnableVia4x" or not. Same goes for the video card temperature and the UT2k3 demo. I'll check those 3 things later tonight and get back with the results. Thanks again...