EarthLink's R&D lab on Thursday released a proof-of-concept application to show how a popular messaging protocol can be used for purposes other than what it was designed, including sharing data. Dubbed SIPshare, the peer-to-peer application is designed to show how SIP -- for Session Initiation Protocol -- can be used for chores other than its typical collaboration and voice over IP (VoIP) duties. Continued at internetweek.com