For a while, people were following the Football Imperialism Map. I'm not sure what happened to that regular post, but I thought the final map was, uh, interesting. As one poster on /r/cfb on reddit pointed out, more than a few people in Michigan live in territory occupied by Appalachian State, while much of the country is occupied by OSU. It seems that we are living in dark times.
and a link to more good stuff on the original reddit page: Final Imperialism Map