Recent interest in People Search sites has created many options, but seldom a success. One such success is Pipl.com - its motto, "The most comprehensive people search on the web." This holds true thanks to its unique method of using content from Facebook, Amazon, Friendster, etc. via what it refers to as the "Deep Web." Pipl.com's Deep Web page defines the term as "a vast repository of underlying content, such as documents in online databases that general-purpose web crawlers cannot reach. The deep web content is estimated at 500 times that of the surface web, yet has remained mostly untapped due to the limitations of traditional search engines."
Other People Search Web sites follow, in order of subjective success rate, measured in number of correct results returned with full name and state. Search site yoName.com ("What's yoName?") is People search across social networks, blogs and more. A widget in the sidebar live-scrolls people searching for others, titled "Looking for Lost Friends." US Search ("Be informed") has People search, background check and other paid premium services. Zoominfo.com finds people and companies. Intelius.com ("Live in the know") also provides paid background check and People search.
The usual personal privacy issues apply. Because it works so well, Pipl evokes these issues more than the others. Making available people's full addresses seems to be more comprehensive than could be considered ethical.