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Continue to ChatGowalla vs. Foursquare: Which One Is Right For You? https://geardiary.com/2010/05/24/gowalla-vs-foursquare-which-one-is-right-for-you/
Gowalla vs. Foursquare: Which One Is Right For You? https://geardiary.com/2010/05/24/gowalla-vs-foursquare-which-one-is-right-for-you/