Alex Massie has a long, thoughtful post:
[B]in Laden's death must prompt a reappraisal of Afghan policy. There will be many Americans who now feel, deep down, the mission has been accomplished. The latest review of policy had seemed likely to recommend, yet again, more of the same. The kaleidoscope has now shifted. The upshot of that is a boost for Vice-President Biden's preference for a smaller number of troops in Afghanistan, more or less exclusively charged with anti-terrorism operations. At present the ratio of allied troops to al-Qaeda targets runs at more than 1,000:1. It is hard to see this as an efficient allocation of over-stretched resources.
Weigel's reporting suggests little chance of a major rethink. He writes that the "the discussion in Washington … has been about how Bin Laden's death can validate the policies already in effect."