I've attempted to simply reply to people's questions and objections as they're made, thus visiting the weaker parts of my position. The evidence for controlled demolition, the starting point of this argument, is far from unimpeachable. I certainly wouldn't call it a "slam-dunk", and there are many truthers who think it's misinformation, as yudkowsky jokingly proposes.

The best evidence of complicity, at least in my opinion, is the behavior of the administration following the attacks. Their efforts to hinder the investigation are a matter of public record, and quite inarguable.

http://video.google.com/videoplay?docid=111797990720729032&hl=en&emb=1#49m22s

I am sorry for linking to things rather than making my arguments in my own words, but I'm arguing with about a dozen people at this point and I'm spread pretty thin.