What other fandoms do you actively participate in? Do you post at the message boards, or just view the pages?

I'm fairly active in The Sims 2 community. I post semi-regularly at a few of the bigger sites and have a Sims-only LiveJournal. I even made a LiveJournal community called SimSecret.

I'm also pretty active in The Office fandom (US version). I'm a member of the main LiveJournal community, Jenna Fischer and Angela Kinsey's blogs, and read all the news.

I also pay attention to the Grey's Anatomy fandom, but I'm not active in it.