Here are three shows that I try not to miss.

Folk Roots/Folk Branches with Mike Regenstreif on Thursday mornings is at:

http://www.ckutfolk.com/

The Midnight Special with Rich Warren on Saturday nights is at:

http://www.midnightspecial.org/

All the Traditions with Robert Resnik on Sunday afternoons is at:

http://www.vpr.net/