McCain's Economics Advisor Faces the Masses

I just wrote the post suggesting that Doug Holtz-Eakin has flushed his credibility down the toilet by claiming that McCain said the opposite of what he actually said in his housing crisis speech, and then I received the invitation to this event with Holtz-Eakin. I will try to go and ask him about this myself. The regulatory question is an obvious one, but sometimes people at these events don't ask the obvious questions. Please provide other suggested questions in comments!