Some people are visual learners while others are auditory learners... Podcasts are a perfect option for the latter. I think that the secret to a successful podcast has to do partially with the content provided, but also with the personality/ties involved and the creativity of the podcast. Below are some of my favorite library and reading related podcasts (Note: Click on the title to go to the podcast site and click on the screenshots to enlarge them):

1. Just One More Book
Discussion of great children's books over a cup of coffee. Features interviews as well. Fun, fun, fun (At least for a children's librarian :)


2. STUN!
A podcast featuring interviews with comic book creators. What works about STUN is that it is very polished, mainly due to the fact that it is a side project of a professional on-air personality: James VanOsdol


3. Behind the Desk: Podcasts from Alden Library (Ohio University Libraries)
Librarians can use podcasts to introduce themselves to their patrons, as demonstrated here by the academic librarians at the Alden Library. There are also library tours in Malay and Portuguese.


4. DiMenna-Nyselius Library Podcasts (Fairfield University)
At DiMenna-Nyselius University, you can find out more about different topics that student have reports about from professors. What I find most fun, however, are their "Meet the Databases" podcasts. You can listen to the databases tell you about themselves.