My cool celebrity look-alike collage from MyHeritage.com. Get one for yourself.
I found this in someone else's blog...neat huh? I had to try three photos before it found one that worked...and then the matches I was given were (a) male and (b) Japanese! I've used some of the women who were said to be matches but I kept the #1 match, a male!
Apparently you can upload pictures of your ancestors and the system will try to match them with other people. Probably early days yet, but exciting technology as their database develops.