I enjoy listening to authors talking about their work. This often gives an interesting insight into their motivation and their writing style. In the interview which was included with the On Chesil Beach audiobook, Ian McEwan talks about how he approached one of the significant parts of the plot. This gave me a valuable insight into the story and really added to my enjoyment of the audiobook.
Publishers, Simon and Schuster, offer a weekly podcast interview with a range of different authors and these make interesting listening. More information can be found on the Simon and Schuster website.