Living all of two miles from work has shortened my daily drive time significantly. Even at 2x a fella cannot get through the introduction of his formerly favorite podcasts, so some pruning was in order.
American Freethought
Astronomy Cast - Science
Big Picture Science
Brain Science Podcast
Ideas with Paul Kennedy
LSE Public Lectures & Events - Ideas (gone is the very similar RSA podcast)
Monster Talk
On Being with Krista Tippett
On the Media - Ideas
Point of Inquiry - Ideas (also gone is its doppelganger For Good Reason)
QuackCast
Rationally Speaking
Reasonable Doubts
Reasonable Faith with William Lane Craig - Religion
Skeptiko -Science at the Tipping Point
Skeptoid - Critical thinking
Unbelievable with Justin Brierly - Religion
Gone also are TED (which really deserves to be watched rather than merely listened to) and PopTech.
I regret most of all the deletion of Skeptics Guide to the Universe, but they have totally "jumped the shark" with some of their newer commercial interruptions. I will continue to make time to read Steve Novella's excellent NeuroLogica Blog.
I still use iTunes to to manager my podcasts.
When I finally move into a cabin in the pines on the outskirts of Prescott, Arizona, I predict my drive time will lengthen, I can repopulate my iPhone, and order will be restored to my podcast universe. Time will tell.