Found this fun little web site today. It allows you to Morph, or combine two head/face pictures into one. Mostly from celeb pictures on their site but you can upload your own images too. Kind of fun to play with.
Site: http://www.morphthing.com (http://www.morphthing.com)
Here's one I did....
I've just done my mate Chris and morphed him with Billy Bob Thornton. fun