I listen to most of the Gun Rights Radio Network podcasts (GunDudes, ProArms, Gun Nation, Handgun Podcast, etc.). Like everyone else, I also listen to Gresham's "Gun Talk". I also listen to Cope Reynolds' "The Shooting Bench", Bane's "Down Range Radio", and Kenn Blanchard's "The Urban Shooter Podcast". I can say I've learned something from all of them, and enjoy listening to them.
The only saving grace is that they aren't put out daily. Otherwise, I would never get any work done.