I have the same situation with this one. http://askubuntu.com/questions/4119/upgrade-from-kubuntu-9-10-to-ubuntu-10-04.
But I am planning to install LUbuntu 10.10 via USB on my netbook after the release. I have only one partition (and don't have any plans yet to create another partition). Is it possible to keep the /home folder while installing aside from backing it up to an external drive and do a clean install?