Firstly, I have a bunch of invites to the Archive of Our Own (http://ao3.org), leave or send me your email address and I'll send you one. (If you left me your email address at sinpoz, you should already have received one.) I recommend it even if you're not a writer, the ao3 has plenty of neat features for readers as well.

Secondly, any volunteers for the org are welcome! Here's the Volunteers page (http://transformativeworks.org/how-you-can-help/volunteer) It's pretty sparse, so I can give you more info about each of the committees and volunteer groups if you'd like. Testers and coders are particularly welcomed, as are tag wranglers, of course. As I mentioned, I'm co-chair of tag wrangling, so it's clearly the best place to volunteer :D

And I'm happy to take any questions, feedback, etc, about tags & tag wrangling at any time!