Excellent How To. But it doesn't address my problem which is how to add music or other non live material to podcasts without using GarageBand. When I get this working to my satisfaction (with or without GarageBand), I will publish my own recipe!
Call me a lemming, but once I understood what podcasting was, I jumped aboard as quickly as possible. Podcasting could be seen as just another way to push audio to people who want to listen to it, but it's really a unique combination of subscription and publication.
My stumbling block? Turning interviews into podcasts using entirely digital production methods that would allow me to make phone calls and record directly to MP3 for simplicity. I worked it out, but not until I went through a lot of trial and error that I'll save you from.