This co-author of The Cluetrain Manifesto was deeply depressed for two years before he found the presidential campaign of Howard Dean. Today, he's the campaign's Senior Internet Advisor.

Hear why David believes the Dean campaign has been so successful with its use of the Internet. You need to "let go of your message," he says. It's not about communicating the top-down message-of-the-day, the traditional way to run a campaign. Instead it's about "getting out of the picture and enabling people to link up--in the real world, especially."

Why would the Dean campaign offer a tool that lets people print posters containing any message they want? Why have they found it's better to offer simple linear comments on their blog instead of supporting threaded messages? And what will happen if Dean gets all the way to the White House? How might he use the Internet, and how might the rest of us change what we expect from our candidates and elected officials?