So far its Petitemistress, mulm and me.
Our preliminary idea is a religious faction inspired by the vatican (vampire hunters of various flavours) versus vampires. Which side is evil and which side is good could be ambivalent, but for now it looks like the zealots are the bad guys.
The zealots are gonna be inspired by catholic clothing, with expensive fabrics, heavy embroidery, intricate ornate armors and such.
The vampires will have a look inspired by various historical factions opposing the church, or nobility. The idea of their costumes is to contrast the rigid, formal religious look with something more wild, playful, unorganized, sexy, etc. (and by sexy i don't mean a breastplate with cleavage, since we can do better than THAT.. )
Attempts to contact Mulm has been unfruitful these last days, so we haven't been able to discuss these ideas with her. So they might change a little or a lot, depending on mulm's input. (Mulm, if you're reading this, please contact us in irc or PM us with your msn etc. )