Free file-sharing services are considering ad-supported business models—but first, they need to win over music label foes. The threat of recording industry lawsuits has certainly given pause to peer-to-peer music file-sharing services. Few have dared show their servers on U.S. soil since the Supreme Court in 2005 ruled Grokster and Morpheus could be sued, declaring open season on companies that enable users to swap copyrighted files.Read more at BW.com