Hah, oops.. the crash with 4365 and xorg 6.8 was something else. The 6113 drivers still don't work though
I have found that X.Org 6.8 composite extension looks neat but gets some very funky graphics corruption.
Also there is a rendercheck program available now which demonstrates some failures with the acceleration. It can be found at http://cvs.freedesktop.org/xapps/rendercheck/
I tried to attach my log file of rendercheck but it didn't work so I put it here http://www.gsoft.com.au/~doconnor/nv-render-accel.txt