At the moment, I'm parked in the McCormick Tribune Center listening to Lawrence Lessig speak, courtesy of the Evanston based non-profit Clio Society. Previously I heard him lecture at the World Wide Web conference, where the presentation was simply head down spoken word. In an interesting demonstration of the principles he's discussing there is now a heavy multimedia component, including appearances by Steamboat Willie, George W. Bush, Tony Blair, Lionel Ritchie, Batman, Aristotle, among others.
Fair use or copyright violation?
Ubiquitous Wi-Fi in Our Lifetime
And where can I get the slides