He started with the most simple and yet comprehensive definition of Web 2.0 shown below.
In case you hadn’t worked it out from his slide, the answer is Web 2.0 applications are identifiable due to their ’round corners’.
He also ran through quite a few live internet demonstrations which is always a brave thing to do in front of the critical Online audience.
Finally he showed what has to be my current favourite library related video on YouTube. It shows a mediaeval monk getting assistance from his ‘help desk’ to overcome the challenges presented by the brand new technology of the book from his trusted scroll.