Software Engineering Radio is a fairly heady podcast on computing topics. I’ve left it on my list for a long time even if I end up skipping through the occasional episode that delves into too many details on Remoting or Model Driven Development. Lately though I’ve really enjoyed their turn towards more interviews with people like Guy Steele working on a Fortran replacement or Werner Vogels of Amazon talking about massive scaling approaches. Might give it a try if you have some available listening time.