The Web is pretty awesome, yet very scary. If you're looking for long-lost friends, Pipl can be the best tool out there. However, if someone is stalking you, then better hide this site from his/her eyes! Pipl scavenges the web with any of the typed in information: name, email, username, phone. It's very interesting, at the same time, intimidating.
Use with caution. But with this site, it's very efficient in people-searching. I still award it with *****. :)