When, less than a decade ago, the Internet emerged as a force in most of our lives, one of the questions people often asked was: Would it prove, like TV, to be a medium mainly for distraction and disengagement? Or would its two-way nature allow it to be a potent instrument for rebuilding connections among people and organizations, possibly even renewing a sense of community? The answer is still not clear— more people use the Web to look at unclothed young women and lose money at poker than for any other purposes. But if you were going to make a case for the Web having an invigorating political effect, you could do worse than point your browser to dailykos.com, which was launched in 2002 by Markos Moulitsas Zúniga.