Does anyone know of an adult comic creators forum?

For women, you can submit comics to and/or join FilthyFigments.com, which is a site focused on original adult comics made by women. It has a forum, and if your work is accepted by them for publication, you can join the private "creators" section, which has what you're looking for.
Alternatively, you could just join the site and chat in the members' forum. I'm sure there would be others interested in the topic.

http://forums.hentai-foundry.com/
not comic makers, but artists in general. probably the most well-known adult art site for artists.

oops, reviving from dead the old thread