Thought I'd keep you guys posted, the P1 USA race dates have been announced and the first race will be running with the H1 series in Madison, IN...
The dates are as follows:

Madison, IN July 1-3
Detroit, MI July 8-10
Morehead City, NC Aug 19-21
Houston, TX Sept 2-4
San Diego, CA Sept 16-18

news and dates pulled from the website