You can look at
asylum_promo and
fandomdirectory to help look for communities, or try searching by interest. I can already tell you there's some FMA comms --
fma and
hagaren_fans, as well as some more specific communities for pairings and stuff. No Escaflowne community that I know about yet. (I picked out those two fandoms from your userinfo because I'm kind of in those -- I wouldn't have a clue about the others.)