Podcasts killed the radio for me.  Here's the tech/developer related podcasts that I keep up with:

• The Changelog - The Changelog is a weekly podcast that covers what's fresh and new in Open Source
• The Conversation - A talk show featuring discussions with special guests, the latest tech and development news
• Scott Hanselman's Hanselminutes - Scott gives practical how-to advice, discusses .NET, social media, and blogging
• A Minute With Brendan - The latest JavaScript news in a minute hosted by Brendan Eich, the father of JS.
• .NET Rocks - A long running podcast for Microsoft .NET developers
• SitePoint Podcast - General news, talk, and opinion for web developers and designers
• The Talk Show - General Technology, Apple talk by John Gruber

I also try to keep up with YUI theater and sometimes Google Tech Talks.