They are in Atlanta as well. One of the strongest organizations in the city is TiE Atlanta.
I am formally attached to 3 early stage startups outside of my day job. In total these startups are comprised of 50% White and 50% Asian cofounders.
Another that I helping is founded by a young lady out of Ghana.
To say that minority populations are not well represented in the Atlanta startup community is not a statement based on first hand knowledge.