If you are unfamiliar with podcasts, they are audio and/or video recordings of your favorite TV shows, radio programs, and personal shows published on the web for download. They are usually free, and you can get them through a service like iTunes, which is also free. There are many freethought/atheist/religion type shows available.
All you need to do is download a podcast player. (Don't worry, they're free.) Personally, iTunes works the best for these. Check out the link below to download. All you need to do is go to the music store in the podcasts section and subscribe to your favorite show. Below, I have also posted some links to the more popular shows available. There are shows also available on Yahoo.
If you have any questions regarding podcasts, please e-mail the webmaster, and I would be happy to help.
Atheist Community of Austin:
The Atheist Experience
The Non Prophets
The InfidelGuy show
Humanist Network News
These are just a small sample of what's out there. Go to the iTunes Music Store page, select Podcasts and start searching!
There's bound to be something interesting out there for everyone.