I checked out all the listed directories for podcasts. The first two were frustrating and the first 5 podcasts I selected did not download, or open. Yahoo was the best. It quickly found the podcasts I usually open from the originating webset, much to my surprise.
I got carried away looking for podcasts on the Educational Podcast Network. WOW! This is a cool way to learn about stuff, and to get ideas for creating my own podcasts.
But wait! I have an Apple computer and an iPod, so I went to iTunes and was stunned by what it available from there for free. Check it out! It's exciting!