Great news that he's dead, but it certainly wont stop al Quaeda in the least. He's just been martyrd, which is one of the big problems in planning out these attacks.... You cant kill the king.
If Bush or Blair were assassinated, it would be a HUGE blow to the nations, not just in actual position displacement, but in morale. With these extreme terrorist organizations, its actually HELPS their morale by killing these guys.
The guy is a monster and deserved what he got, but this is by no means a chance to sit down.... it's time to dig another one.