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Just like last year, this year's edition of SXSW is once again heavily focused on location-based application. While the genre is slowly moving away from check-ins and virtual badges and more towards "social discovery," though, it's still rather debatable how useful apps like Highlight or Glancee are outside of the conference and Silicon Valley bubble. One location app that...

Foursquare checked into our lives in 2009 and has rapidly grown its user base to 15-million, tripling in just over a year. And now the US-based service reports that just over half of its users reside overseas, largely in emerging market countries. The social network is a piece of innovation that has won the hearts and minds of the fickle...

Oink, the first product to come out of Digg-founder Kevin Rose's Milk project, launched earlier this week. At this point, the thought of yet another location-based app that lets you rate things may induce some involuntary yawning in you. After testing it for a while now, though, I have to say that while I was highly skeptical of yet another app in this space, Oink actually puts enough of a twist on the genre to be interesting and to become a potential challenger to similar services like Foursquare (or even Yelp) in the long run.

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.

Trover, which quietly launched earlier this month, takes some of Color’s most basic ideas and puts them into an easy to use free iOS app (iTunes link). The app is based around the idea that you want to share photos of cool places around you with the rest of the world. There is also a location-based social networking aspect to the app, but you could easily ignore this aspect of the service without losing it’s basic functionality.

As more information about the “secret” location-data file on Apple’s iPhone 4s and iPad 3Gs becomes available, the story surrounding this discovery is becoming more about the people involved than the location data itself. As it turn out, Alex Levinson, a student at the Rochester Institute of Technology, had long discovered this file in his research and work with forensic firm Katana Forensics. Katana Forensics produces a tool called Lantern, which can extract this data and map it in Google Earth’s KMZ format.

This is going to be a major PR nightmare for Apple. Security researchers Pete Warden and Alasdair Allen today announced that they have discovered that all iPhones and 3G-enabled iPads keep a log of your every move in an unencrypted file that is hidden inside the iOS filesystem. The files are backed up and restored every time you sync...