With data consisting of Facebook "likes" (and thus, something not 100% scientific), the New York Times put together a cool map of the "fan footprint" of 82 college football teams.
I haven't traveled throughout America, so I can't vouch for its authenticity, but it looks cool, and Ohio looks right to me.
Also, condolences to all the apparent Oregon Ducks fans in Alaska. Today is about to rough for you.
