Loomia: "a podcast and videocast search engine plus much more. Our goal is to help you discover, share, and manage things of interest to you. We make use of the likes and dislikes of an ever-increasing community to filter through thousands of channels to help you find good stuff." It invites you to add your own tags to the content.
Librarians should check out some of the podcasts filed under the tag "library."
From Neat New Stuff I Found This Week http://marylaine.com/neatnew.html