Santa Monica-based TagWorld is reporting that it has grown to over one million members, as it launched a new music discovery tool this morning. The Draper Fisher Jurvetson-backed startup rolled out a new music discovery engine this morning, which allows users to create a personal music station based on a listener's interests. The music discovery engine uses user input to determine what kinds of music to play, as well as allows friends to influence what music gets played. TagWorld is a social networking tool that competes with MySpace.