Both those are national sites, but might have regional areas (there's a ga gardening forum on davesgarden, for instance)
eta: it was through davesgarden that I learned about my favorite nursery for native plants, down in Fayetteville. Once or twice a year I make the trek from Holly Springs just to talk native gardening and wildlife habitat with them (and to feed my planting addiction, of course)
Match, I am specifically interested in vegetable Gardens right now. We are wanting to experiment with a hoop house this winter perhaps. Unfortunately we have mastered peppers, but don't eat them. Hopefully we will have better luck with some of our other veggies this year.