Also this might help in the Georgia area:
http://freepages.genealogy.rootsweb.ancestry.com/~gacemete/This is a Georgia Cemetery Volunteer listing. They may already have an effort underway or if not, could possibly start one for you.

Also try:
http://www.interment.net/us/ga/index.htm
it's a great resource for cemeteries in general

For Preservation in general you could contact Robert Mosko-of Mosko Cemetery and Monument Services at:
http://www.cemeteryrepair.com/
He is the most knowledgeable person I know when it comes to restoration and preservation of cemeteries and headstones

and last (but far more costly):
http://chicora.org/pdfs/Chicora

Hope this helps!
Peace and blessings,
lu