Couldn't agree more. 
I'm quite surprised really, by all the "experts" who are, all of a sudden, knowledgable about the statutes for awarding the Nobel Peace prize, written by Alfred Nobel. They're clearly not, and therefore just plain wrong. 
Obama has, in his short period in office, dropped the plans for the nuclear shield and opened up a line of dialogue with the Russians, calling for nuclear disarmament. He's realigned the US with the UN, made clear that the US will follow the Geneva convention, opened up a dialogue with the moslem world, shown a willingness to accept the Kyoto accord and so on. In short, he has made an appeal for cooperation and peaceful coexistence that is a most welcome change in the White house. For those who bought into the Bush/Blair rhetoric this change must hurt more than a bit, and I believe the reason for a lot of the uttered ridicule of this years' Nobel peace prize laureate can be found here.
Leaving Afghanistan and the region now would ensure Taliban/al Qaeda reentering the hot seat. What would that mean for Afghani women?
Get this, too: Obama has inherited all the wars the US are currently involved in; in ****stan, Afghanistan and Iraq. (Just like he inherited the US economy post-Bush.) If he were to extract all US troops today, he'd be desecrating the graves of the brave soldiers who gave their lives trying to make a difference for people they never got to know. 
And for the cocky and oh, so independent Europeans that really believe that the USA, under any president, still is a nation in love with the concept of "might is right" - well, the EU couldn't even stop Milosevic themselves, on European soil! We had to rely on the Americans, yet again. 
Hail to the chief! Obama is definitely a "good guy", and is recognized as such by the Nobel Peace prize committee. Don't get your knickers in a twist!