There are several great podcasts for Salesforce Admins that I like to listen to on my commute.

Cloud TNT: A podcast specifically for nonprofits using Salesforce.  Lots of great interviews, news, and they always end with a favorite app for nonprofits.

ButtonClickAdmin: Both a blog and a podcast, hosted by a Salesforce staff member who focuses on “clicks not code.”

My favorite iOS podcast app is Overcast.