At the Video on the Net 2007 conference: here (please click on the link).
At the Video on the Net 2006 conference: here.
A lengthy talk at Edelman’s London office: Parts 1, 2, 3, 4, 5, 6, 7, 8.
Appearance on CNN’s Reliable Sources about Facebook: here.
Appearance on Eye to Eye with Katie Couric: here.