I found this Q&A with Alton from his March 15, 2008 demo at the Chicago Museum of Science and Industry
The blogger has a link to some nice pictures on Flickr too
If you ever get the chance to attend one, you should go!
I've been to two. One was a cooking demo and the other was a lecture.
Alton is so quick witted and funny. He can certainly work a crowd too.
I keep looking to see if any of the stars are going to be in Columbus, that's an easy drive from here. Since it's a fairly large city because of the college I always think that would be the closest they might get to here.