MyEpisodes.com

Via Planet Warp, Blaxter blogs about MyEpisodes.com. Useful to keep track of your pending episodes to watch and acquire. I like the “All-In-One!” view.

Update: Oh, and as several people mentioned, there is also pogdesign.co.uk/cat, but that’s only a calendar of upcoming episodes, you can’t track your status with it AFAICS. OTOH, it doesn’t require a login, only a cookie.