SXSW, Or NXNE, Amex Teams With Foursquare To Put Emphasis On 'Express' Wherever You Are... - 0 views
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Steven Groves on 16 Mar 11"American Express has developed a simple app that can turn Foursquare's "check-in" feature into a highly secure method for its cardmembers to complete transactions or participate in local store promotions. "