The Congressional Research Service has recently updated several publications on Afghanistan, including these (all pdf).

“NATO in Afghanistan: A Test of the Transatlantic Alliance,” updated July 16, 2007.

“Afghanistan: Post-War Governance, Security, and U.S. Policy,” updated June 21, 2007.

“Afghanistan: Narcotics and U.S. Policy,” updated June 19, 2007.

“Afghanistan: Government Formation and Performance,” updated June 15, 2007.