Lets face it, tha War is a freaking decable. Its probably the most poorly devised, authorized, and executed military action in the last 600 years. The whole thing is directly in the face of the constitution, and those key figures involved should probably be hung for treason. It has done irreparable harm to the image of the United States, and has squandered vast resources that were, and still are, need elsewhere in our depressed economy. Thats not even to mention the harm it has done to the image to those within the country who no longer trust their own government. (I'll save the rest of my thoughts for the book

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That said...
I honestly think that if we pull out now, without really cleaning up the mess we started, things will be much, much worse. Whether that means sending in additional troops, or throwing tons of money into training and supplying allied troops (which has a history of backfiring. read: Osama Bin Laden), I can't say. My gut tells me the right thing to do, is just as the "terrorist" don't want us to do. Set up hospitals, schools, business, and colleges. If we do it, that means they can't, and we win the heart of the people by feeding and educating them (Just like Hamas did in the south). Its honestly a route we should have done before we decided to blow everything up. I certainly won't pretend to have the answers, but I know the current direction is a huge mistake, and the idea that one can "export" democracy is really in the face of the idea of democracy. This war is just about the best example of that as I can think.