Knowledge by Ear?
jgercken asks: "I recently survived a 16-hour drive solo thanks to having downloaded 10+ hours of old Off the Hook shows, a 2600 sponsored radio program. It is so refreshing to hear news from a technically cognizant perspective. Is anyone aware of any similar programs or maybe sources of recorded lectures?"
Although Audible is a pay service, it has an enormous amount of diverse material.
I think my favorite so far has been "Surely you're joking, Mr. Feynman".
I signed up for two books per month and I'm WAAAY behind on listening to it all in the car (some books are as long as 24 hours).
Also see:
This sig is self referential.