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David Gelles

As anticipated, location-sharing services were the talk of the town in Austin as engineers and entrepreneurs convened for the South by Southwest Interactive festival.

“Location, location location,” Playfish chief operating officer Sebastien de Halleux told me when I caught up with him. “It’s a big theme for the web at this stage.”

That may be true. But despite the genuine promise of location-based services, and all the hype around the budding rivalry between Foursquare and Gowalla — rival applications that let users “check-in” and share their location with friends — this stuff is still a long way from being mainstream. Read more