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Page last updated at 17:55 GMT, Tuesday, 20 April 2010 18:55 UK

Local is the new global

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Social networking sites allow millions of people around the world to stay in touch with friends and family. But even people who love Facebook and Twitter often lament the fact that this 'virtual' contact often happens instead of face-to-face connections.

The latest technological twist in social networking may have the potential to change that by enhancing old fashioned physical connections.

Sharon Carpenter reports from New York.

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