Two important points here:

  1. Radio Me is a term coined by Peter Day of the BBC for what was formerly known as podcasting. English media appears to bending over backward to never say the word iPod or podcasting
  2. If you have a commute more than a few miles each day and are not listening to Radio Me then stop reading right now and order a portable MP3 player asap -an iRiver or an iPod are probably the best options (iPod may not good if you listen to music because of Apple's iTunes store lock-in, I consume free podcasts + do a lot of running so the iPod mini was perfect)

Ok, you have an MP3 player. Now go and subscribe to feeds. There are many clients out there that will auto download new 'RadioMe transmissions' in the way your aggregator gathered this blog post. iPodder is a good one to start with - it works with any mp3 player and works flawlessly with my iPod Mini (which cannot bookmark MP3s - aarghhh, bloody marketing - that's why I bought it).

In a year of listening to Radio Me this is what I think all my .Net buddies should at least try:

IT Converstations Far better than all other technical podcasts combined!

Many episodes every week which are often open source focused, but we all need to know what is happening outside of .Net. Many broadcasts are recordings from IT conferences or interviews with extremely successful individuals. Steve Wozniak and Jerry Yang  episodes that immediately come to mind. Where else would you get to listen to people like this? It is also interesting to realize how little Open Source people bash Microsoft nowadays - Apple receives far worse treatement.
This Week in Tech Leo Laporte + friends from The Screensavers discuss the latest happening in Tech. They are not 100% Geek compared to most of us 'in the trenches' and their minor mistakes with details will irk you. Shortcomings aside, this bunch are very entertaining and keep me abreast of new happenings. Presently this is a firm number two on listening list.
.Net Rocks (AAC Feed) Our local hero and possibly the friendliest face in Atlanta's .Net community Mark Dunn helped start this one. Since Rory left the show it is not quite the same, but many episodes are still stellar. Ted Neward 'vs' Don Box including ORM, Java, Spring etc is great one to start with - rest your mind before listening.
Slashdot Review Most .Net people sneer at /. Every other techy in town seems to rave about it. IMO spending five minutes a day listening to the best posts is proving well worth the time.
Daily Source Code Adam Curry - the Robert Scoble of Podcasting Radio Me. Adam is not so technical and freely admits it. Living vicariously it feels like I experience his multi-million dollar lifestyle a couple of days every week. He is the most entertaining podcasters out there, yes IT Conversations will teach you much more but do give this whirl.
BBC: From Our Own Correspondent Since leaving Woking, England I am have become more American every day. This BBC broadcast really reminded me of this, so I force myself to listen. It is not technical at all, but for anyone interested in life outside of the USA give this a whirl. The BBC broadcasts quite a few shows on RadioMe - exPats may like it, I felt almost homesick for the first time in ten years :)

Yes, that is the list, notice how short it is? I have about ten more shows I listen to regularly, but none I would strongly recommend to anyone else. Just like blogs there are a many Radio Me broadcasters, but making quality audio appears to be much harder than buying a $40 microphone - the best all have a background in TV or Radio. Within a year I think Radio Me will have circa twenty well known technical shows with others trying for a while then fading (back to blogging?). As an example you have time to scan my 'F-List' blog in a few seconds to evaluate if a post is worth reading. Listening takes much more effort.

Final point on in car use of MP3 players: Transmitters are OK if you are patient trying different frequencies, but drain the battery and do drop out occasionally. I bought a 'Head Unit Aux Adapter' from my dealer ($40!) + dismantled the dash and connected it to the stock radio. I hear Best Buy etc will do the work, but personally it took 30 minutes install time which was fine apart car looking like this for a few minutes: