US Spec Ops in Pakistan

The Guardian has an article in which a former NATO officer confirms and outlines four US special ops incursions into the Pakistani tribal zones between 2003 and 2008 , three to go after Al Qaeda/Taleban figures and one to recover a Predator drone.

Frankly, I had always assumed there was more clandestine activity than that, although this only lists military run, unit sized raids, not recon, CIA, or whatever else.