http://www.youtube.com/watch?v=2PVzOVMCASo&t=62m57s  You should watch a few minutes into this, it talks about linguistic similarities between Szabo and Nakamoto, how bitgold was the closest thing that existed previously and was suspiciously absent from the reference page on the bitcoin whitepaper.  They also talks about how Szabo went dark on social media at the same time Satoshi disappears, very curious content, would love to hear your 2 cents.

I am very privy to the idea that bitcoin was made by a group rather than a single person, and I think you might be right about Nash.  But what I am thinking is that the person that was actually on the forum, talking to people and answering questions, I think that was most likely Szabo, and that he was working with someone like Nash helping him behind the scenes.  Nash was more of a mathematician than anything else, so having a prolific coder like Szabo or Finney working closely with him makes a lot of sense, and having someone else do the forum posting would have made it easier for him to stay out of the limelight.