David Allen’s book Getting Things Done spawned an industry which has taken to doing podcasts. Allen’s own site hasn’t quite got in on the act yet, perhaps it’s on his Someday/Maybe list, but it has collated some audio interviews.
They’re all Allen talking on various radio and podcast shows so there tends to be a lot of overlap of topics as GTD is introduced each time. And I’ve had some problems getting the audio to play reliably so that’s two things against it but have a go with one and see what you think.