Scott,
Besides the Rootsweb/Ancestry.com South Carolina and Georgia message boards, which you can find on my "Civil War Message Board Portal" at http://history-sites.com/cwmb , there is a South Carolina board at http://www.researchonline.net/civilwar/sc/genboard/indexq.htm . I don't know of any other Georgia message boards.
We're very fortunate to have the dedicated contributors here at the ALCWMB.
Jim