Well, Karmic expired about two months ago, and I never updated. It seems like now is the time, since I will also be installing a backup HD (never had one before), so a fresh install will prevent me from having to do any configuration with the new HD.
However, I have a dilemma. It should be easy to just use 11.04, since it is the new release, but because of the interface change, I don't know how good it will be. This will be my work computer, so I can't have stability problems. What is the general consensus regarding the new interface? Should I wait for another version until all the kinks are smoothed out?
The other option is to use the 10.04 LTS, which would actually be supported longer, and would be another natural upgrade from 9.10.