I subscribe to a tonne, but these are the ones I actually listen to regularly:
Film Junk
FilmSpotting
PTI
BS Report
Dan Patrick
Adam Carolla
Dave Dameshek
Comedy and Everything Else
Common Sense with Dan Carlin
Dan Carlin's Hardcore History
Scientific American
Science Magazine
NPR: It's All Politics
NPR: Planet Money
CBC News World Report
Definitely Not The Opera
60 Minutes
KT