I really like the view in the Faces section of iPhoto when you are identifying possible matches. You get the closeup of just the picture and you can see all of the ways the person has changed over the years (assumine you are actually looking at a match).
I would like to automate the process of generating a slideshow that shows only the person's face. Does anyone know of how it might get done in iPhoto or with a third-party product that could leverage iPhoto's faces data?