Heads up Chili’s and Foursqare fans, Chili’s Grill & Bar is now offering free chips and salsa if you check in using Foursquare. This is the first time that a national chain has embraced the location-based, social networking phenomenon. Location based programs have been catching on in the Android market in popularity. Gowalla, Loopt, Foursquare, Yelp, and Where are a few of the applications that allow location based check-ins. Hopefully this is the first of many chains to do something like this. Happy eating!