I enjoyed the talk re the Popoff takedown, but the speaker himself (whose name I can't recall), wasn't the most dynamic person I've ever heard.
I looked at the P&T, and Adam Savage, more as entertainment interludes. Adam is fun, but Mythbusters is not exactly rigorous science. Its claim to fame is, in my opinion, that it introduces people to the concept of skepticism and experimentation. He's not someone you would invite to speak on skepticism in and of itself. Even though he was talking about creating a accurate model of a movie prop, the undercurrent was how to research, measure, experiment, test, verify.
To say that people go, to say that I go, to TAM because of Randi or JREF, is way off. My first experience with JREF was when I saw an ad for the cruise to the Bermuda Triangle two years ago, in one of the skeptic magazines. I was only marginally aware of who Randi was. I didn't go to meet him, I went to meet people who are more like me. I've been to three TAMs and two cruises. At TAM6, there were seven people attending that came because I 'recruited' them. A few of them didn't know they were skeptics, because they are never around people who think like they do. They also didn't really know who Randi was, except through learning about TAM.