The transformation of American politics by the Internet is accelerating with the approach of the 2006 Congressional and 2008 White House elections, prompting the rewriting of rules on advertising, fund-raising, mobilizing supporters and even the spreading of negative information.

Update: Micah Sifry found this article wanting. He writes:

I'm putting my money on the real shift, which is the movement of power away from the center and top and to the edges and the bottom. A harder story to report, for sure, and one that the consultants in DC are by definition ill-disposed to understand. But that's the big story, and it's coming.

Internet Injects Sweeping Change Into U.S. Politics