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• There is this nTag Conference Badge article from 2008, http://florence20.typepad.com/renaissance/2008/10/the-smart-ntag-badge-conference-badge.html.
• This badge is used by The MIT Technology Review Conference.
• The nTag Conference Badge is used to manage attendees and to manage the event.
• The badge connect to other badge via infrared.
• The badge connect to its central server via a WiFI module.
• Here is the full screenshot of the article.

• Some features of this nTag Conference Badge are these.
  • Applications.
    • Attendees networking.
    • Digital agendas.
    • Interactive event maps.
    • Logistic management.
    • Session attendance analysis.
  • Database management.
  • Interactive sponsorship opportunities.
  • Real time web application that accessible for the organizers and the attendees.
• Here is the screenshot of the feature specifications.