I just hope the Nouveau project continues to advance at a good rate so this can be usable to those of us who are given integrated nVidia chipsets at work.
I have a GeForce 9300 and KDE has problems with many effects, and instability with others. I have to disable compositing for a stable system. I am thinking of switching to Gnome next week to see if it's any better. (I use Fedora 13.)
Yeah I buy exclusively ATi chipsets for personal use, but sometimes you don't have a choice.
Prefer not to go down the proprietary driver road for all the obvious reasons.