I have serious concerns about McCain's outlook on the world. While foreign policy is supposed to be his strength, his positions and rhetoric IMO suggest he either sorely lacking in understanding or completely naive.
How on earth could one believe that America would be greeted as liberators in Iraq or that the war there would be won easily? Even non-military people with zero experience in foreign policy (eg. historian) could tell you this is implausible. McCain may be able to lead a regiment into battle, but I'm not sure I'd want him making the decisions about where those battles should be taking place.
McCain remarked that Obama is naive when Obama said he would kill Bin Laden if he knew where Bin Laden was and Pakistan wouldn't take action. I find that much more reasonable than McCain's offhand remarks about bombing Iran and wiping out North Korea.
The judgement call on focusing on Iraq over Afghanistan seems like another example of dropping the ball. Likewise the 'surge' tactic seems to me another ploy or a tactic used by somebody who doesn't get that more guns doesn't necessarily mean more success. It's other efforts that will make the necessary gains if any are made at all.
Here's a deeper analysis of the 'surge':
http://www.cnn.com/2008/WORLD/meast/...rge/index.html