Los Angeles-based social networking site MySpace has launched a beta of a new social playlist service, My Music 2.0, the firm said Tuesday. According to MySpace, the music playlist hub will allow users to build and manage their own social playlists from its music catalog. Among features of My Music 2.0 is the ability to include playlists on MySpace profiles, plus social discovery tools which allows users to see what recent music their friends and favorite artists have listened to recently.