Old friend Steve Monsen at the Alliance for Children and Families and I have been discussing the tech side of Podcasting for Nonprofits (note I am decidedly more of a content development person). They run a Drupal CMS (Content Management System) -based site and want to keep everything on the same server. While I still recommend Libsyn's hosting to everyone I know (they make it just too easy), he found this link which I thought would be worth sharing with anyone who might be interested:
Podcasting With Drupal (via Awakened Voice)
Good luck with the show, Steve!