Digg (one of my favorite websites) now has a feature to find, listen, and vote for podcasts. If you haven’t used Digg before, check out their site. It is one of the best places to find news stories. Users of Digg submit and vote on stories, which results in the most interesting stories of the day landing on the front page.
If you have checked out Digg before, then head on over to their podcast section. I think I already subscribe to almost every podcast in the top 20 on Digg. You can also click on a specific podcast and vote on individual episodes, listen to any episode from the Digg site, or drill down into specific categories (education, arts & culture, etc.) to find specific podcasts.
Digg is a very popular site, and it can get very addictive once you start using it.