What is the best absolutely free people finder?

There are several people search services online. Finding the best would really depend on the user. In my opinion, the best one should be easy to navigate and would be able to give the user the information he/she needs. I am really comfortable using waatp.com. It aggregates data from open sources such as social networks, web search engines and even offline sources. Most people search services show biography, photos, physical address, blog entries, news, related web links and other kind of information about requested person.