My list of active podcasts has shrunk a little recently so I'm down to:

Art of Wrestling with Colt Cabana
Guardian Football Weekly
Guardian Politics Weekly
The Spectator Podcast
The Bugle
Skeptoid with Brian Dunning from Skeptoid Dot Com
Little Atoms

and when they're running Infinite Monkey Cage, Robin & Josie's Utter Shambles and Richard Herring's podcasts (not the snooker one)