Former Pak PM Bhutto has said repeatedly and recently that if Punjab remains quiet the Pak government is secure. Punjab is the source of the population, the economy, the power elites and the army. I have seen no evidence of any movement of any importance in Punjab to try to overthrow Mussharaf in favor of Bin Laden.
There is widespread sympathy for Bin Laden and dislike for America in the muslim world, but translating those feelings into a revolutionary movement to overthrow their indiginous governments is quite another issue, for which I have seen almost no evidence.
That's the way I see things, some Internet articles notwithstanding. The support in Quetta, which is growing as the result of the bombing, can complicate matters for the US military, however.