I'd love to hear interviews with some of the journalists who have been writing terrific articles on the autism/anti-vax movement.
Specifically, Amy Wallace at Wired (who was viciously attacked by the people at Age of Autism). Also, Trine Tsouderos and Patricia Callahan, of the Chicago Tribune. They wrote a great series of articles in May, mainly centered around Mark & David Geier, and a local doctor who was promoting some of their dubious treatments, and they just published another series of articles in November, centered around dubious treatments for autism.
The articles by Wallace, Tsouderos, and Callahan are pretty much everything that proponents of science-based medicine could ask for, and I'm sure they'd make for great interviews (and also great TAM speakers...)