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Local Merchants, It's Time To Ditch The Sidewalk Chalkboard For Foursquare Welcome Screens
Sep 14, 2010
Erick Schonfeld
<img src="http://tctechcrunch.files.wordpress.com/2010/09/4sq-chalkboard.jpg"> As Foursquare becomes more and more popular, so is the sidewalk chalkboard sign beckoning Foursquare users into the loca