I commute all the time in Atlanta. I only use my bike for EVERYTHING except laundry (and if i could find a way to get 6 loads on my bike, i'd do it!). Intown Atlanta is fairly bike friendly. Some areas that are especially bike friendly: Roswell, Midtown, Virginia Highlands, Grant Park, Cabbagetown, Inman Park, Decatur, Emory, Druid Hills, Stone Mountain (if you know what your doing), and Candler Park. Also, generally speaking, once you go south of I-20 ATL isn't bike friendly (Grant Park/Cabbagetown are exceptions though i often wonder about cabbagetown). As long as you stay in those areas i mentioned, you'll be just fine. Heck, on some days I dont even carry tubes, I'm always within a 1/2 mile of a bike shop! Also, if you are really dedicated to living for cycling, check out Inman/Freedom Park if your into artsy stuff. Grant Park if your aren't. Enjoy Atlanta, its got good cycling weather. Ohh, and stay away from the suburbs, especially Alpharetta, I used to live there. Holy crap, i'll never ride there again!