CS547 Human-Computer Interaction Seminar
[streaming videos of this years lectures]
includes Bill Moggridge of IDEO on Designing Interactions his forthcoming (in errrrr.... 2005) book supported by a DVD which will have video interviews with various experts in the design field

upcoming are:
Howard Rheingold on, of course, smartmobs and Michael Slater of Adobe

last terms videos are still available (which I linked to before)