The subtext of Obama's speech is that he can be exempt from the constraints of moral leadership implicit in the receipt of the Nobel Prize and still use it as a political marketing tool. But it doesn't work that way.
Peace begins with those who have the power to make peace. Obama stands in a unique position in this regard. We've turned the corner from Bush's belligerence, but avowing peace isn't the same as action.
Obama's detractors don't seem to understand that the Nobel Committee has offered not a false Medal of Distinguished Service to a green recruit, but a powerful weapon to a talented cadet eager to take to the battlefield.