Philadelphia Magazine's Sasha Issenberg, who you may know from his starring role in Tigre Hill's Shame of the City, is tracking the 2007 race in his Campaign Journal.
He brings a unique blend of historical analysis, political science, and critique of campaign strategy to his work. Besides that, anyone who can recall a simpler time when police commissioners wore their hearts on their sleeves and their nightsticks in the cummerbunds, is worth a read.