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Groups, as most Twitter users know, is one of the most often sought after features. Currently, many users use TweetDeck to organize Twitter into something akin to groups, but there's almost no doubt that everyone would benefit from groups as an integral part of Twitter. Twitter developers may be afraid that it's going to complicate the service that built its reputation on simplicity; perhaps if this experiment proves to be successful, they'll integrate groups into the English version of Twitter.
Check out the video below to see how it works.