Nokia Sensor

This is a app made by Nokia specially for Series 60 devices that works throughout Bluetooth.
With Nokia Sensor you can:

• Spontaneous social circles
• Your portable personality
• Instant communities and networks
• Free to download, free to use
• Free file sharing

"Nokia Sensor is a spontaneous, sociable application for spontaneous, sociable people. With Nokia Sensor you can create your own personal pages - called a folio - on your phone. Then you can check out the folios of other Sensor users nearby, exchange messages, and share files."

The only thing I don't exactly know is how you can find in 10 meters around you a person with a Series60 phone and this app installed that doesn't have anything else to do than seek people that matches this extremely rare case. But I think that Nokia knows better than me the utility of such a thing. With Wi-Fi it would be very nice ( 450 meters around, not just 10 ) but with Bluetooth I'm a bit circumspect of the utility of this thing.
You can view a nice flash presentation, read more and download the app at Nokia