From Chili's to Target, leading restaurants and retailers are showing an enthusiasm for piloting location-based marketing offerings from a range of hot New York and Silicon Valley start-ups including Foursquare, Shopkick, and Gowalla. Guru Raj, APT's Senior Director of Corporate Development and Marketing, recently discussed the emergence of location-based marketing, as well as some of the questions and challenges it presents for restaurants and retailers in RetailWire. Click here to read more.