We're also seeing multiple plans "leaked" (military occupation vs. in-and-out vs. a coup with some other thug left in charge). I thought that that was fine concerning planning for the actual invasion (it's not the place of the citizenry to debate military tactics) but it's a bad idea to do that for post-invasion nation restoration. I understand that perhaps President Bush wants to keep his options open so that he can play the alliance game better, but in this case I do not think that such concerns outweigh the benefits of a real discussion on what to do with Iraq after we conquer it. That's one of the major failings of the Left these days - instead of spouting appeasement in the streets they should be out there demanding actual planning for post-invasion Iraq.
UPDATE: The Chicago Boyz weigh in with an excellent post that draws from Powell's own writings on the subject. As a bonus they also discuss the systemic problem with the State Department.