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"Facebook has announced that as part of its attempt to make addresses consistent across its site, the company will start merging the unique vanity URLs and Facebook email addresses of ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/socialmedia/2012/04/13/facebook-wants-a-more-unified-you-will-start-merging-your-facebook-email-and-timeline-addresses/?awesm=tnw.to_1E1nR>