Methinks Musharraf never had much incentive to press the attack -- in a practically lawless, remote section of the country -- that would merely incite the radical islamists against him and his government. He did take some action to appease the USA (and for which he undoubtedly received compensation as well).
Without acquiescing to US covert operations, OBL and the rest of his entourage probably will escape their just fate (death).
As for getting UBL and Al Zawahiri - If our shooters are allowed to operate independently .....we will get'em!! - But operating in that area to begin with is brutal - The terrain alone makes operations extremely difficult - Transport, logistics and supply operations become almost impossible -
Call me an optimist but I think we'll get both this year! - I really believe Rumsfeld is going to get his way (one way or another) and our shooters are going to start hunting in the Pak border region -