Running nouveau here on my G92 8800 GTS 512MB, have been ever since it's been available on Fedora, and now running it on Kubuntu also with no problems whatsoever the entire time. It may still be beta in terms of features depending on the card, but stability has been rock-solid for me pretty much the entire time. Still running plain xf86-video-nv on my other distros for the time being, but I've mostly moved from Gentoo to Fedora as my main distro now.
No announcement yet.
The Nouveau Pony Is Pulled, Ctx_Voodoo Ignored