The names are available.
A or B are both interesting enough to feed a future passion.
A is a subset of B really, unless A and B have different focuses. I was wondering if there was an unwritten rule/natural fit towards building city sites or state sites and/or a natural user bias/preference for one?
Both; is an interesting idea. If both sites had the same focus then using the Georgia example it could have sections for Atlanta, Augusta, Columbus, Savannah …Marietta and Smyrna. Would it be a good thing/bad thing to have the bulk of content and data for the dominant Atlanta mainly on the second domain instead?