Gatsby + Foursquare: Find Friends or Enable Stalkers?

Such is the power of social media that a query on Facebook via Friendfeed, from an online friend I’ve never met despite college and social circle overlaps, led to discovering Gatsby, a location-based social recommendation service that works off the Foursquare mobile social platform. Gatsby looks at check-in data from Foursquare, then sends text messages to users phones suggesting that they might want to meet so and so because of common interests and being nearby.