Please explain how this whole PRODCASTING thing works?

Answer 1

Podcasting is a means of communication, of teaching or for small businesses to sell over the Internet, that is at the finger tips of everyone. We can all become producers on the Internet.
If you are interested look into this address. You can also visit the podcasting Expo coming up in April where there are podcasts about podcasting.
http://www.internationalpodcastingexpo.com/

Answer 2

This Wikipedia article explains all about podcasting, it should answer any questions you have... http://en.wikipedia.org/wiki/Podcast