Hi lostmytail! and welcome to the forums and DWT family!
A podcast, simply stated, is like a syndicated radio show that you can download and subscribe to.
You can learn more about podcasting, as well as how to subscribe and listen, etc. at www.mousetunes.com!
A list of FAQs is available at
http://www.mousetunes.com/podcastingfaq.php
Enjoy!!!