I sure wish this fellow didn't make so much sense. In a three-part series of articles, he explores the likely civil and military landscape of near-term future Iraq, and discusses the options available to the U.S..
Chris Weigant on "The Endgame In Iraq":
Short summary: Unless you're living in Fantasyland, all the options are bad. It's just a matter of picking the least awful.
The best that inveterate optimists, such as myself, can hope for out of this is that cocky military adventurism may be discredited by this disaster, at least for a few decades. Again.
(But as at least one recent study observed, pessimists are more likely to be correct.)