Well I was going to get my dress altered in North Georgia (where we live,) but I decided to find a location near my work. I came across "Essie's Alterations" in Smyrna, Georgia.
I HIGHLY recommend her, you guys. She is only open Tues., Thurs., Fri., and part of Saturday, and she is not a bridal shop. She will do men's clothing and women's clothing as well as wedding gowns. She has several photos of brides whose dresses she's altered, and she has at least one wonderful review online as well.
She is also VERY reasonably-priced! If you don't want to pay $200+ for wedding gown alterations, and you live near the perimeter (she is about 1 mile off the perimeter off Atlanta Road,) I recommend her.
Essie's Alterations - Vinings area - 770-319-6074
(She does not have a website)