Jonathan Dodson: Recent Facebook research reveals some interesting trends on what connects people in regions of the U.S. Using 210 million Facebook profiles, Pete Warden has documented and illustrated how and on what regions and cities connect. It appears that Facebook users range from a dense, regional connectedness to a cross-country connection. The lines of connection cluster into 5 regions: Stayathomia, Dixie, Greater Texas, Nomadic West, Mormonia, Pacifica, and Socialistan. Check out the interesting trends from each FB cluster.