This article, which originally appeared in the London Independent on August 13, 2002, is, I think, excellent in both sensitively disputing the official account of Flight 93 and highlighting the US media's reluctance to do so. I am unaware if the titular questions have been answered in the past three years, or whether the journalist's sources have since been discredited; Cberlet, as you seem confident that they have been, do please provide proof! Otherwise, I maintain that parts of this wikipedia article is based on American public opinion rather than fact.
http://www.world-action.co.uk/independent.html