If we're to judge the quality of the two conventions by the quality of their streaming video, then hands down it's a victory for the Democrats. The Democratic Convention site had, and still has, high-def video using Move and Silverlight. The Republican Convention site has fuzzy YouTube videos.
Maybe the poor video resolution will be flattering to McCain's complexion. There is some element of this disparity in online experience that is consistent with the Luddite image of the Republican Party, especially McCain, relative to the Democratic Party.