The Best Podcast for Military History Buffs: Pritzger Military Library
I'm a big military history devotee (especially WWII and the Civil War). Recently I ran across an amazing resource: the Pritzger Military Library in Chicago. I'd love to go there, but you can do so remotely by subscribing on iTunes to its regular podcasts (pritzgermilitarylibrary.org). They feature the best writers on military history (e.g., James McPherson, Rick Atkinson, Sir Max Hastings, Carlo d'Este, Craig Symonds, and many, many more).
The podcasts typically relate to new books (though not always--Rick Atkinson recently made a presentation on "ten things you should know about the American army in WWII"). The author usually gives a 30-40 minute presentation and then the always-well-informed audience asks questions. It is amazing to hear McPherson speak about Lincoln in Tried by War, Atkinson to speak of his trilogy (third volume to be published in 2013) about the American forces in Europe in WWII, Max Hastings speaking of his many books relating to WWII and other military subjects, and Carlo d'Este talking about Patton.
They now have scores of podcasts in their archives so you can pick and choose what you want to listen to.
After the Ricochet podcasts, this one has become my favorite.