I've only read a little bit about OpenADR, and AFAIK that info isn't exposed to us. Your best bet is to contact PJM, or check out their site:
http://www.pjm.com/markets-and-operations/etools.aspx
They have some really interesting tools and data feeds, but more are only available to utilities or they cost a lot of money (thousands of dollars a year), so they're out of reach of an individual.
Later,
Ryan