I went to the Minnesota Public Radio site and downloaded a podcast of one of the Midmorning with Kerri Miller episodes. The one I chose was titled "The Dumbing of America." I personally don't think I will create my own podcast but I do intend to subscribe to a number of them.
As for the podcast directories, I liked Podcast.com the best. It was simple and easy to use. Podcast.net was down so I couldn't get to it and the other directories were pretty good.
My library is working on creating podcasts of general staff meetings so that employees who are unable to attend these meetings will still be able to listen to the information at a later date.