Hi,
I use Xubuntu 9.10 and that has 2.6.31. 2.6.33 and higher wont't do for me, because the nvidia kernel driver won't compile on 2.6.33 and higher.
It will compile with the following patch: http://bugs.gentoo.org/show_bug.cgi?id=301318 Related thread at the nvidia forums, here: http://nvnews.net/vbulletin/showthread.php?t=148290
This old post gives handy pointers if you've never unpacked and patched the nvidia driver before: http://forums.debian.net/viewtopic.php?t=24776
Martin (who appears to have run out of full stops)