Most of the racing in 2007 happened in the Ohio/Eastern US. Matt Marks ran some in the east also. Two cars from the east did travel out west once and were the only Spec Focus to run out west last year. Some Focus did run in PT all over the country. Check these site news and results. Thanks for your interest any question post here.
http://racenasa.nasamidwest.com/
http://specfocus.drivenasa.com/