Who will be the people powered candidate in 2008?

Joe Trippi wrote a post on MyDD that discusses how the Dean campaign was built around the people and looks at the 2008 Presidential race...

The Dean campaign was different not because of ideology or because of opposition to the war -- but because it revolved around its supporters and empowered them. It was the only campaign in a long time that realized that the people were more important than the candidate.

James MacGregor Burns wrote "A transformational leader stands on the shoulders of his followers, expressing coherently those ideas which lie inchoate in the hearts of the followers -- and in the process makes his followers into new leaders."

Al Gore is doing this right now around the issue of Global Warming. Dean did it in 2004 for President. Who in 2008?