Great list, Coop!
Some officials believe that [Abu Obaidah] could have been a replacement for Hamza Rabia, Al Qaedas operational commander, who was killed in a similar missile attack in Asory village in North Waziristan on December 2.
http://www.dawn.com/2006/01/19/top4.htm
It is SO difficult to find a good #3 man in a worldwide terrorist organization nowadays!