Slides of my "Open-Source Collaboration Tools are Good for You!" presentation at openexpo.ch Bern, April 2009. Video at http://www.youtube.com/watch?v=XdNyzNCRLd8 . Relooked and slightly expanded from previous versions, including "speaking in URLs" and "making mistakes in public".
Clipping is a handy way to collect important slides you want to go back to later.