I brain-dumped my experience of installing the Ubuntu-5.10 on my new IBM Thinkpad T43 (2668-HH5) laptop and posted it on my homepage at Ubuntu On IBM ThinkPad T43 (2668-HH5)

Hope that might help someone who want to install Debian/Ubuntu on his/her own T43.

Updated @ 2005-10-27:

I have added a benchmark section in the memo based on Alex Lau's kind suggestion. It would be interesting and helpful to compare different distributions on the same hardware platform. But I am not very familiar with the criteria of the benchmark on GNU/Linux, I hope we will keep it further later on.