Core77

Attendees at this weekend's hacker-event-of-the-year in New York, The Last HOPE will receive RFID badges to improve physical networking at the conference.

...the Attendee Meta-Data (AMD) project will introduce a new location-aware social networking system to track and bring together hackers based on a huge array of matching interests.

The AMD social networking site lets visitors "tag" themselves based on a diverse set of interests. Old-school hackers, network security experts, cryptographers, political activists, law geeks, lockpickers, reverse engineers, bloggers, privacy advocates, and far more--visitors can label themselves with multiple interests, to become discoverable by fellow visitors from around the world with similar interests, in the same room or across the building. Attendees can then use email or text messages to "ping" the people they discover on the site--new contacts and old friends alike...

...participation is voluntary. And attendees who do participate can choose to reveal as much or as little personal information as they desire. Users can see other users' handles, but contact information is not divulged until users send or reply to pings.

Sounds awesome but really, how many people in the room outside of the FBI do you think are going to be competing for the real identities of visitors.