First and foremost, dancarlin.com for both his political and history podcasts. If you have not heard any of his history podcasts, please give it a listen.

Next would be Marc Maron at wtfpod.com and the occassional Kevin Smith smodcast. Really liking the new Fraiser podcast he is doing with Matt Mira

Dead Robot Society and Narrative Breakdown, because I do a lot of writing

And of course my podcast I do with 2 friends on writing and technology, typehammer.com

Yes, there are no programming podcasts listed. I guessed that is what you may have been looking for, and if so, sorry.