You can even search for the 7th dimension phone book link between you and unknown or known number by searching in Linkifi.
The first social search application of its kind, Linkifi is fast and fun utility that makes use of today’s technology to show just how small our world is. Whether you are with a friend at a bar, a colleague at a conference, flirting at a party, chatting at the office, on an airplane or in a dorm room, finding out who you know in common is a great way to break the ice, to start a conversation, or kick-start one that has stalled.
Linkifi makes for a new type of real-life, real-time social networking. Instead of sitting alone at the computer, Linkifi puts social networking into the hands of two people together in the same room or over internet.