All the mods and the fandoms are listed here (http://www.bathtubdjinn.com/muse/mods.html). The instructions for applying are there, too. If there's someone you want, but they're already taken, check to see when the last time they updated was. If they haven't answered one of the four most recent challenges, you can probably put in a request for them.

You have to answer at least one in every four prompts, the fics have to be 150 words. The only thing is that since it's not a roleplaying community, the RP isn't moderated. Most of the time that's not problem, but I figured I should say that. :D