News from Lake Wogegon is great. It's available as a podcast. You can get a lot of them:
http://prairiehome.publicradio.org/about/podcast/
We listen to a lot of old radio dramas. Gunsmoke, Dragnet, Sherlock Holmes, Lum and Abner, Jack Benny, there are a lot of them. I'm not old enough to remember radio dramas (but I did watch some of those shows on a black and white TV.) Besides it's good entertainment even without the nostalgia factor.