Not everyone is a fan of LJ either, especially since longer fics like these would need to go in multiple LJ posts. But I do like the idea of leaving it open to the writers where they want to post, and then having the mods do a nice, easy-to-navigate masterlist. The advantage of the AO3 is that it would create that masterlist automatically and in general make things easier on the mods, but you're right that it might drive down participation. Also I'm not sure how good the AO3 would be for hosting art.

Thanks for offering to do this, the_muppet! I loved reading and seeing the art at last year's Big Bang so I'd definitely like to see something like that happen again.