I've been working with Smalltalk, which was Alan Kay's creation. Most implementations are not what he intended -- at one Smalltalk Solutions keynote he excoriated all of us. He said that he never intended Smalltalk to become a programming language. He wanted to create a Montessori toy for the mind. That said, I don't think that Smalltalk as a programming language is that far from what he intended. He just never intended it to stop there.