I've just been exploring Podcastalley.com
I searched 'book news' which brought up an interesting list. My favourites are 'Compulsive reader talks' with author interviews and readings, and 'Radiobook lounge' which also has author interviews and readings, as well as audio reviews and storycasts for kids and adults. The list is quite extensive for just this one heading. I'm looking forward to revisiting the site and investigating further topics.