I was looking through Wikipedia (http://snipr.com/1nau6) for a good reproduction of Michelangelo's Last Judgment (as background to some reading I've been doing on Rembrandt - http://snipr.com/1nauj) and I stumbled on this article. Looks useful. It's certainly true that the image of Jesus in the fresco is pretty enigmatic. He doesn't look wrathful, nor does he look welcoming; he seems to be thinking. And the position of the hands is especially mysterious. So I think Dixon is on to something in trying to parse the theology that underlies Michelangelo's portrayal.

For images, see this clip.