Brightkite is a service that allows users to be notified of of other Brightkite users in the area...or if they are going to be going to the same area.
www.brightkite.com
Microsoft, time to spend some coin and snatch this one up. The "social" on zune is retarded...I have stood in a packed convention hall looking for someone else with a Zune to no avail. If I had this service, myself and others could be notified of the -potential- of other zune users.....not this strange wifi prospecting that we are forced to do now.
Enhance the social...or Microsoft, buy Brightkite
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