I don't podcast anything, but I get podcasts from a few different sites:
Stratfor.com: A private CIA-type organizaton which puts out a free 3-4 minute podcast for its subscribers on the latest global issues. It's free to join - highly recommended. You get one spam per week, which is them asking you to upgrade to their paid service.
Cato Institute: A libertarian think tank with a 6-8 minute podcast on current issues.
The Mises Institute: An economic school in Austria dedicated to free markets. I download lectures which vary from 15-60 minutes each.
Newt Gingrich: His daily podcasts aren't too great, but his weekly ones are a bit better.
Sean Hannity: Has a 6-10 minute snippet of him interviewing people, which is presumably from his show, which I don't get to listen to.
BreakPoint: Chuck Colson's Prison Ministries website. A 3-4 minute commentary on Christian ministries and/or worldview issues.
Anyone else download regular podcasts from anywhere?