About the same time podcasting was being born, I became enamored with the Democracy Now and Air America Radio. I started writing RSS feeds by hand so that the already freely downloadable content from both these sources could be sucked up by podcatching applications.
Both Democracy Now and Air America now maintain their own podcasts.
Democracy Now - http://www.democracynow.org/podcast_help.shtml
Air America - http://www.airamerica.com/premium/