I love libraries and I think in another life I might easily have become a librarian. Here is a new page from the excellent librarians at the Stanford Graduate School of Business Jackson Library: GSB Blogs/Podcasts. It will need some more organization and navigation features as it grows, but it’s a nice start.
In the greater scheme of things, Stanford University lectures and interviews have been available for a while on iTunes: see Stanford on iTunes U. If you commute to work and listen to podcasts on the way, give it a try!