Another option: NPR has podcasts for most of their shows, several of which I pull into gPodder. Then I can download & listen offline. But the podcasts usually only have recent items. I haven't figured out how to download older items, for example:
http://www.npr.org/templates/story/s...oryId=17095866

In my case, I'm listening in the car, so streaming wouldn't work for me.