Phoronix: Ubuntu 9.04 To Get Nouveau Driver

The Nouveau driver has been in development for several years now but with limited developers that are reverse-engineering NVIDIA's GPUs and there being no public documentation or support from NVIDIA, it has taken quite a while to come up with a reputable open-source driver that supports all of NVIDIA's hardware. Nouveau still doesn't have a stable released version of its 2D DDX or Mesa 3D driver, but development snapshots of it have appeared in Fedora and a few other distributions...

http://www.phoronix.com/vr.php?view=NjkxNg