25 Free People Search Engines to find Anyone in the World | FinderMind
http://www.findermind.com/free-people-search-engines/

Wow

From the website: "I’ve been in this people search industry for over 2 years now and while researching, I found many free, high quality free people search engines to help you reconnect with friends, family, school friends or any other person from your past. So I decided to put them in one huge list. Here they are:" - I haven't tried any of these but usually these lists are handy

Pipl.com: People Search Engine So Good, It Will Scare Your Pants Off /by @roicarthy on @TechCrunch http://j.mp/9VZTnJ

Pipl is ok, but I don't feel it's that detailed. Sure you get results from all the profile-sites on one page, but other than that. I just feel pipl should come up with some results that it doesn't.