I stumbled across the "Free Software and Open Source Symposium 2006 Toronto" on the weekend, it has some excellent video and audio material discussing various aspects FOSS.

Includes speakers from OpenOffice.org (Louis Potts), a Drupal company, Mozilla project, Novell etc. http://cs.senecac.on.ca/fsoss/2006/speakers.html

Download the video/audio directly at http://cs.senecac.on.ca/fsoss/2006/recordings