A Podcast on podcasting
Go down the page until you see the article A Beginner's Guide to Podcasting: Part 1 - A Consumer's Guide. It’s the 13th one down.
Right click on the Listen Now link and Save Target As… to your desktop
After it downloads listen to the presentation-it’s about an hour. You can view the slides by clicking on the Supplemental Material link.
Play!! The 25 Technologies in 50 Minutes presentation is also very good.