Podcast frenzy

Podshow.com Is not only a source of podcast news (click on the news tab at the top of the page), it is also a small, easy to browse database of podcasts that otherwise might be quite hard to find.
It also provides links to other podcast sites such as Podcast Alley and Indie Podder.
Indie Podder is pretty decent since it organizes its databse into separate categories. Click the Media tab and there's a good list of links to news and media related podcasts. Alternatively, you can just browse through all of the other tabs and just see what you come up with.

SeattlePi.com - A short list of news and entertainment podcasts, some of which are broadcast by U.S. newspapers.