you may also try the
Comics Creators forums.
fair warning though--they eat people. if you post there, post an actual synopsis of the story, as well as the character descriptions, and what, if any, compensation you're prepared to offer.
and wear a thick skin. because they may critique everything you put up, and if you get offended, they will roll their eyes and write you off.
that said, there are some really good artists there, and plenty of new ones looking to get their feet wet with some manner of project.