Atlanta has a decent size rails community. You should consider looking more deeply into the positions that are available. Companies who use .Net tend to be old

Atlanta has a decent size rails community. You should consider looking more deeply into the positions that are available. Companies who use .Net tend to be older and more mature businesses (likely because .Net is not open source) and I am not positive but I would think that they are looking for highly experienced developers. I would take a close look at the entry level positions that are available in the area that you want to work and possibly even contact those companies and ask what exactly they're looking for. Also, a possible imperfect way to determine the ROR community size in a city is by searching for Ruby / Rails meetups in the area.