http://www.scotcampus.com/2011/12/george-r-r-martin/
[Note: Martin appears most prominently about 7 minutes in, discussing the works of Jack Vance, and then at the 45:50 mark answering a few questions.]
http://sfsqueecast.com/2011/11/episode-6-a-song-of-thanksgiving-and-sound-problems/