A great TED Talk from Lawrence Lessig (aka Larry Lessig), on how the fundamentals of law are not ready to coupe with the present process of generating culture, the phenomena known as user generated content. It's a very elegant presentation of "3 examples and one argument".

I'm a great fan of Lawrence's work, read some of his books, praise him for the creation of the creative commons license, and love the way he does presentations (with the slides synchronized with the speech).