Just a heads up: AMA has now ended. Patrick was gracious enough to extend his time from 30 minutes to 1.5 hours. There's some real gems in those Q&A's. Definitely recommend checking it out.
Like jbigelow76 mentions the AMA happened in the Disqus comments. I didn't realize some people might disable it, so I'll make sure to show them a message asking them to enable it.
Thank you, most people I know actually disable disqus comments as they do any service offered for free that is embedded on multiple websites. The tracking is just too obvious. Same idea with gravatar.
(Disclosure: I'm the founder of BetaList)