Technology: A Posse That Fits In The Palm Of Your Hand

If you have a hard time keeping track of your party people on a Saturday night--and your social life currently centers on Boston, Los Angeles, New York City, Philadelphia or San Francisco--a new service called Dodgeball might be of assistance. After you sign up (free at dodgeball.com) you can text-message the service with @ followed by the name of the local hotspot where you happen to be hanging out. If there's a fellow Dodgeballer in the vicinity who has identified you or one of your connections as a friend, you'll get a message sharing that person's coordinates. You can...

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