Howtoforge updated their prefect desktop guide for Ubuntu 10.04
>> The Perfect Desktop - Ubuntu 10.04 (Lucid Lynx)
This tutorial shows how you can set up an Ubuntu 10.04 (Lucid Lynx) desktop that is a full-fledged replacement for a Windows desktop, i.e. that has all the software that people need to do the things they do on their Windows desktops. The advantages are clear: you get a secure system without DRM restrictions that works even on old hardware, and the best thing is: all software comes free of charge.
>> The Perfect Desktop - Ubuntu 10.04 (Lucid Lynx)