Great thread. And an important issue. I think we need to be very careful in our intervention in Pakistan. We are pushing the issue already with the missle attacks in the un-governed areas along the border, but I believe that is an acceptable risk. You really can't discuss Pakistan with out discussing Afghanistan in the issue. The ISI has supported the Taliban for years. And the problem most people have is separating the Taliban from al-Qaida. And it seems like the government, first Bush, now Obama, have no interest in ensuring that the public understand the difference. As you stated pouring more US troops into Afghanistan and increasing operations there has the potential for creating more problems in Pakistan, an already fragile government. I fear that Afghanistan will become a bigger quagmire than Iraq ever was, and so far history has proven that notion to be correct.
For some light reading on the subject and from a historical position there are some good reads here:
http://www.theatlantic.com/fs/search...words=Pakistan