I forgot to link to Yglesias' great article explaining why McCain is a Neo-con's wet dream. Money quote:
"He's [McCain] the candidate of ratcheting-up action against North Korea and Iran, of new efforts to undermine the United Nations, and of new cold wars with Russia and China. Rather than hating war, he sees it as integral to the greatness of the nation, and military service as the highest calling imaginable. It is, in short, not Bush but McCain, who among practical politicians holds truest to the vision of a foreign policy dominated by militaristic unilateralism."