Nanuk -- actually missing from Angola, and was found last week in Guinea -- repainted and with it's registry numbers changed -- and then promptly lost again. There was a rumour that it was again located and impounded in Beirut, but there seems to be some confusion as to whether or not the plane impounded in Beirut is actually the one which went missing from Angola.
Despite all of the paranoia about the obvious terrorist potential for a spare 727 converted into a 200,000 gallon fuel tank loping around out there, the investigators do not actually think that it is a case of terrorism. The plane was idle for more than a year before it vanished, because Air Angola (it's owner) performed the conversion without proper licence and the plane was grounded by the Angolan government. The conversion project was supposed to be part of an airbrone fuel-delivery venture in Africa that never got off the ground (pardon the pun) and I would imagine that the financial losses involved are pretty salty.
Anyway, an American leasing company holds the note on it, and it was a representative of that company who obtained authorisation from the Angolan government to move the plane, pending repair maintainance and the payment from the American company to the Angolan government of a $ 50,000.00 fine. Their whole point was to repo it, not fly it into anything. The American representative from the leasing company was one of the two men known to have boarded the plane shortly before it's unauthorised takeoff.
The last sighting of the plane was over the Indian Ocean, and the last radio contact was from the crew asking for permission to land in Seychelles. Permission was granted and the plane was neither seen not heard from again.
Despite all the media frenzy about this, in light of the above facts (all distilled from various ROGUE TANKER IS COMING TO KILL US ALL!!! news stories) it's sort of hard to imagine that the plane is anywhere but the bottom of the Indian Ocean.
Phaedrus