I'm a fan of podcasting because it allows me to listen to subjects that I want to learn about when I want. I can't tell you the last time that I listened to the radio in the car. As soon as I get in the car, I get my episodes queued up.
Just today, I needed to make a quick trip to the library, and instead of driving 4 miles there, I ended up taking my bike and I was able to hear two solid interviews, one about personal productivity and one about how to use Facebook. It gave me a lot to think about while pedaling.
Listening to people's voice is a huge thing too. I was able to recognize Jason Van Orden from Internet Business Mastery at Blog World this year, by hearing his voice.
Great post Cesar!