Looking at location-based services
      
          Mobile apps that use your location to offer services are no longer new. But are they truly useful to businesses? We look at Facebook, Foursquare, Google, and Yelp, along with some new and upcoming location apps.                                             
http://rss.macworld.com/click.phdo?i=28e16324e1dd1a974a0daad2f23e89e4