* "Shopkick shows innovation in location-based services is not over"
http://scobleizer.com/2010/09/16/shopkick-shows-innovation-in-location-based-services-is-not-over/
* "Shopkick, Simon Properties Planning Location Based Coupons"
http://www.informationweek.com/news/software/crm/showArticle.jhtml?articleID=226700238
-S.