I'm a huge fan of these two shows:

On Point - Two hours daily that has lively conversations that cover everything from breaking news to ancient poetry, and features writers, politicians, journalists, artists, scientists and ordinary citizens - http://onpoint.wbur.org/

To the Point - A news based one-hour daily program that focuses on the hot-button issues of the day - http://www.kcrw.com/news/programs/tp

Cheers!