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"Ping, the app that reimagines email as an IM-style activity (read our full review) has today relaunched under the name Hop after receiving a cease-and-desist letter from the maker of ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/apps/2013/10/17/im-style-email-app-ping-renamed-hop-naming-dispute-golf-club-company/>