Ive listened to the CG podcasts and for the most part they are informative and entertaining.
http://www.portafilter.net/ also have coffee related podcasts.
Id love to hear some posdcasts from CoffeeSnobs. Maybe the upcoming Aroma fest could be a source of interviews and comments.
Perhaps some interviews/recordings from CS get togethers or training days.
Maybe some short instructional recordings would be useful...