For all you Linux, and BSD Users out here, here's my suggestion
Dishout 179$ for Xig's Summit 2.1 for the ATI Radeon 8500, DRI/DRM just utterly suck
http://www.xig.com/Pages/Atop/SummitPriceList.html
I know the idea may scare some of you, But i've been an AcceleratedX user for along time, and i will just say it's simply the best. You won't find any better support, or any better drivers.
You will get the 3D support as you desire, and proper 3D better then the DRI support.
It's currently on sale for 179$ take a look, it's worth it!