My morning read of Urban Junkies turned up a fun mobile service:

Dodgeball can tell if there’s a ‘friend of a friend’ within close range and put you in contact. And you can even flag up strangers profiles who look ‘appealing’ to you and then be notified when you’re socialising in their proximity.

The friend of a friend, or LinkedIn effect, is probably the most appealing aspect of this software- especially if you live in a large city. I can imagine its even more useful if you’re single.

It wasn’t clear if you have to pay for the service though…And, since it’s not available in London, I won’t be trying it anytime soon…