Audacity Tutorials
http://audacity.sourceforge.net/manual-1.2/tutorials.html

How to Create Your Own Podcast - A Step-by-Step Tutorial
http://radio.about.com/od/podcastin1/a/aa030805a.htm

How to Podcast using Audacity
http://www.how-to-podcast-tutorial.com/17-audacity-tutorial.htm

Podcasting in Education - Apple Video Series
http://www.apple.com/education/resources/podcastingvideos/

Making a Podcast - Apple Web Site
http://www.apple.com/itunes/store/podcaststechspecs.html

Podcasting with GarageBand
http://www.apple.com/support/garageband/podcasts/

Podcasting with iLife ’08
http://www.apple.com/ilife/tutorials/#garageband-podcast-51

Videopodcasts with QuickTime
http://www.apple.com/quicktime/tutorials/videopodcasts.html

Videopodcasts with iMovie
http://www.apple.com/ilife/tutorials/#imovie-sharing-30