Blog Talk Radio is similar to iTunes. You can do your own radio show (podcast) or your can be a guest on someone else's show (podcast).
The post my bad boy found contains the instructions on how to be a guest on someone else's show. If you'll only be "appearing" once as someone's guest, you don't have to worry about a schedule, script and guests each week yourself.
If you want to check out what others are doing on the radio, tootle over to Blog Talk Radio
If you want to check out marketing on Blog Talk Radio, tootle over to Internet Radio