I'm aware of a few other kinkmemes on livejournal, but as far as I know, they're not being actively filled. It's hard for me to tell w/out having a flatview to view most recent comments.

Here are the ones I know:
http://yj-anon-meme.livejournal.com/
http://dccomics-meme.livejournal.com/
http://dc-kink.livejournal.com/