[anchpop]

Seems like something that would be solvable by technology. Facebook has a dataset of what billions of people look like, they could probably find 2 or 3 who look exactly like me

[J-dawg]

That would be amazing (but also incredibly creepy). It would also probably end up finding a lot of people who actually are related and don't know it (adopted children etc)

[scott_s]

The women profiled here set up a website for it: http://www.twinstrangers.com/

[gymshoes]

One could upload celebrity headshots and find their doppelgangers here