I'm a big fan of listening to podcasts while working or driving. I listen to a couple that are related to geocaching and, if you're interested, I'd like you to check them out. They are family oriented and contain a lot of useful information.

www.podcacher.com - My favorite. Very well put together and I enjoy the stories and the "audience" involvement.
www.geocachingpodcast.com - Another great podcast that has a wide range of topics related to geocaching. Anything from equipment to caching events.

So, if you're lookingfor some cheap entertainment (free) check these podcasts out. I'm sure there any many more out there, so if you listen to any different ones, feel free to list them! I love listening while I'm out for a run as they take my mind off running.

Take care,
  Bob