I've been using Ubuntu as my primary OS since Feisty alpha 3 (Dapper was fine, Edgy was just too edgy) and I've run the development release ever since. Initially this meant I was reinstalling every month or so as an update borked by system, but since then I've been able to fix most problems I come across.

I normally hang around in the Testing and Discussion area of ubuntuforums.org. Last release I was tracking FGLRX and xorg-server changes. I also try to help out with UK English translations on Launchpad, though that has taken a back seat recently.