Ubuntu 8.10 has been released and I installed it last Saturday on my Acer M1641 desktop. It is really very smooth. The only thing I need to do is to use the Nvidia proprietary X driver to get 1280x1024 resolution. I did not encounter problems I met with Ubuntu 8.04 (http://mcuee.blogspot.com/search/label/Ubuntu).
Good job, the Ubuntu team!