Some examples:
http://www.ratemyface.com
http://www.hotornot.com/
http://www.amialookalike.com/
http://www.amithefox.com/
http://www.beautyorthebeast.com/bb/Photo_RateMe.asp
http://www.cuteornot.com/
http://www.likemybody.com/index.php
http://www.rateanddate.com/
And variations:
http://www.meoryou.com/index.php
http://pickthehottie.com/
http://www.ratemyfaceoff.com/postvote.cfm?vmode=1
http://www.ratemynoise.com/
http://www.whossexier.com/