In a moment of curiosity, I uploaded a couple of photos of me into the face recognition demo linked from Martin's blog.
Using this photo, I was told that the closest matches to my face were Ehud Barak, Takeshi Kitano, Charles Manson, Placido Domingo, Bob Marley and Montserrat Caballe. I am more than a little concerned that only one of them is female!!
This photo yielded slightly more acceptable results: Kirsten Dunst, Dean Martin, Madonna (that'll be my conical frontage!), Gwyneth Paltrow, Mariah Carey and Penelope Cruz. Also listed were Bertold Brecht (really?) and Rutherford B Hayes who I've never heard of but who has an impressively bushy beard (do I look like that?!)*
I have to say I don't really think I look like any of them!! But it was fun trying.
Dan (also worryingly) matched Harold MacMillan, Celine Dion, Marlon Brando, Sophie Marceau and Friedensreich Hundertwasser (no idea who he is but he has a good name!)
* OK so he was the 19th president of the US