I highly suggest Obama wrap things up quickly and give Pakistan writ in Afghanistan so that we may avoid aggression with the US and India and tackle lawlessness once and for all.
Not unless a significant majority of the Pashtun in Afghanistan want a loose federation with Pakistan - because that is the only way the Pakistani military could avoid the pitfalls of 'foreign occupiers' the Soviets faced before, and Yanks face today in Afghanistan.
Don't for a moment think that the Taliban will hesitate to use the 'invader' card against any force that prevents them from imposing their writ in those areas - the TTP is a prime example of that.
I would argue that in any configuration, Afghanistan and Pakistan will likely have to agree to implement some sort of 'Shariah Law', most likely a form that adheres more closely to the obscurantism of the Taliban, than the progressive form suggested by the Council of Islamic Ideology, in return for some sort of disarmament in the insurgency wracked regions.
The NWFP government's efforts in Swat are currently hung up on this very issue, with the TNSM leader Sufi Muhammed demanding more concessions towards his POV in the Shariah Bill proposed by the NWFP government, and Mullah FM suggesting he would disarm if a Shariah Bill supported by Sufi Mohammed is implemented.
I am not sure how overboard SM's deamnds are, but if disarmament can be verified and enforced, this may be a reasonable interim arrangement to stabilize society, develop local institutions to prevent similar weaponization and militias, develop the local economy, moderate opinion through education and bring about change over the long run.
Again, if the SM's demands start off with no female and/or modern/scientific education, this should be a non starter, since conceding to that demand means we lose the most powerful instrument for introducing change beyond the interim.