Find Nearby Friends with your Cellphone

Some time ago, I thought I invented something cool: using location-based services in your cell phone to find if and when any of your friends are nearby, and where. Today, I searched for it and read that Chuck Fletcher and Jason Uechi, of Montclair, N.J., have now done it. If you have a Nextel phone, you can download it today at http://mologogo.com/.