In July 2009, we held a one-day symposium on open science at the University of Toronto. I recently uploaded video from those talks to YouTube; the audio is a bit shaky, but I hope they're useful despite that. The talks are linked below.
David Rich: Using 'Desktop' Languages for Big Problems
Victoria Stodden: How Computational Science is Changing the Scientific Method
Jon Udell: Collaborative Curation of Public Events
Greg Wilson: Opening Remarks