The beta of the Odeo (http://www.odeo.com/) podcast service is now open to the public. It's a great place to browse and search for podcasts and sync them with your favorite audio player. From their website:

So...we've opened the doors. After months of hard work, we're proud to welcome you to Odeo. We're still very much in beta, so we appreciate your feedback (and patience). But please look around, listen to some stuff, subscribe...have fun.