I just ran across this fun face recognition tool that shows which celebrities you look most like. Before using the tool you need to create an account, but it's free and they don't appear to check most of the fields (so put whatever).
Nick Lachey was one of the top males that it claims I am most similar to. I only bring this up because in the past my wife has (generously) claimed that I resemble him in the face - so perhaps the tool is somewhat accurate.
(via Steve Goldhaber)