Well, I *presume* they don't actually have a nuke, since one's not gone off. God, I hope not.
I agree about the death photos. It seems somewhat likely that he is dead (there are witnesses of the raid, and the risk of a backlash from radical Muslims would surely outweigh the benefits of lying), but some people will definitely doubt his death unless undeniable evidence is brought forth, and I personally won't be absolutely certain until we have irrefutable proof.
We can't be certain that the Pakistinian government was hiding him. It does look extremely suspicious, with him hidden a mile away from their military academy, but I don't think we can be certain.