I'm rather busy right now, but wanted to start a reply. You said:
>"It's one of those theories that require way too many people to be involved to have any chance for success without significant leakage of information."

Well, there was a stand down of NORAD that fateful morning for "terrorists simulation exercises". Now do you think that was plain co-incidence? Also, didn't you know that whistleblower Sibel Edmonds says that the Saudis had a back door computer program for our American Airlines and had access to all our flight information?
And what about all the put options a couple of days before for American Airlines supposed to have been drawn from a bank in Switzerland for 5 million that has never been touched? (That bank had large holdings from the CIA's Buzzy Krongard.)

>"For such a plan to have been conceived, administration officials would have to had to coordinate with the terrorists who flew the planes."

No one here cares to address the story I have been telling of Mohammed Atta and the life he lived here in Florida. He had international pilot's licensces according to his girlfriend, so he really didn't need to "learn how to fly". He was always flush with cash and drugs, PILES of it. His florida driver's license was from the Pensacola naval Air Station and he had a get-out-jail-free card from the FBI and FAA around here. And he was working with Bin Laden's brother out of Miami who was bringing these other pilots freely into the US from his flight school in Switzerland.
Huffman Aviation in Venice, Florida was bought and paid for for one million in CASH by a man named Wally Hilliard who is one of the largest contributors to Jeb Bush's campaign here in Florida. He runs Lear jets in south west Florida. One of his jets was found with 43 pounds of heroin at the Orlando Executive Airport the same month Mohammed Atta came to Florida. And it was one of Hilliards' Lear jets that flew out of Raytheon Services in Tampa to pick up the Saudis and fly them home from Lexington, Kentucky after 9/11 while all other flights in the US were grounded.

There are 1,000 things that don't add up, have never been publicly addressed or were even ALLOWED during the 9/11 investigation.
BTW, for those of you too lazy to watch the video, I suggest you go to the first third of the video, approximately 16 minutes and 40 seconds into it and watch the evidence for the crash at the Pentagon for starters.