Here's Dick Hardt's presentation on Digitial Identity in a similar style to Lawrence Lessig's presentation on Free Culture. Remember the refrain: "1. Creativity and innovation always builds on the past. 2. The past always tries to control the creativity that builds on it. 3. Free societies enable the future by limiting the past. 4. Ours is less and less a free society."

Apart from the interesting style (no bullet-points) the content is important. What I got from Dick was the notion that identity==reputation. In my search for meaning in online reputation, attention and trust I thought identity had to be in there too but it looks like it is a corollary.