First of all, let me comment that I am in no way trying to dispute the idea that the New Testament really states that Jesus is God/part of the Trinity/ whatever. I am disputing a specific reference which seems to me very ambiguous.
Both you and Classical Hero are taking it for granted that the phrase "I am" refers to something else in the Bible. There is no evidence for this. Moreover, please note that Jesus' statement that he was God (if that is what he was in fact saying) is not, in fact, technically blasphemous in Jewish law. Nothing is blasphemous in Jewish law, then or now, except the misuse of the name of the Lord. It is highly ... unusual, but so is the simple statement that Jesus was immortal (the literal implication of the phrase). The statement of immortality in itself explains the shocked reaction of the Jews.