I don't really get much time to listen to online shows like I used to, but I will make time for this: Chinua Achebe reads and talks about his book Things Fall Apart on BBC Online's World Book Club. It's usually a good program with smart questions from the audience and the moderator.
I notice that one of the recent books featured was The No. 1 Ladies Detective Agency by Alexander McCall Smith. Never read any of his books, but people tell me all the time that they are extremely funny. I'm curious to find out more.