http://www.lockergnome.com/social/2012/02/16/top-5-mobile-social-networks/ - When you think of social networks, you likely think of popular platforms like Facebook, Twitter or even the reminescents of MySpace of LiveHournal (the latter two of which we think are likely on the verge of making a comeback.) However, with the rise in use of mobile devices, many developers are creating social networks designed only for mobile users with little (or no) web-based component.
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