I think you need to get more than 8 total votes to count. Dean and Ron Paul were both web fads, but Obama used it as an organizational tool and got results from it. Even if he doesn't win, he's forever changed the way campaigns will be run.
Dean wasn't a web fad, he was leading all the polls until about two weeks before the first primary when he opened his mouth and started saying stupid shit.
I agree, Obama wasn't the first to capture the Internet as an organizational tool, but he did it to a new level and made it a powerful weapon in his arsenal.
Dean was the first one to realize the Internet could be used. But Obama built up an incredibly powerful campaign force in part by using the Internet to coordinate vast amounts of people.