When it comes to location-based services, check-in apps like FourSquare and Gowalla are probably the ones that have gotten the most attention. For the most part, though, the usefulness of these apps is still not quite clear. After all, there has to be more to location than discounts, virtual badges and mayorships. One service that has been trying to bring some much-needed attention to actually helping users solve a real-world problem through your phone’s built-in location features is EchoEcho. The service, available for iOS, Android, Symbian, Blackberry and (soon) Windows Phone, wants to make it easier for you to find and meet up with your friends. EchoEcho does so without forcing you to sign up for yet another social network (it just uses your existing address book) and its inherent usefulness means it doesn’t have to resort to “gamification” to get you to use it.