For popularizing rationality (and hence raising the high water mark), online video is a solid choice of medium. In addition to the beat-it-into-the-ground simplicity of the Khan Academy lectures, there are some subjects where a less intensive, more conversational approach may help. People have been made to learn certain principles by rote (e.g. Bayes) but may have never grokked the full implications; I would love to see an animated visual in the style used by The RSA in Britain, fitted to a lecture on Bayes.