Harmonix and MTV Games today announced that Australian alternative rockers The Vines, as well as English pop rockers Sweet Billy Pilgrim, will both make their Rock Band debut next week in the Rock Band Music Store of downloadable content for the Xbox 360, PlayStation 3 and Wii.With more than 400 artists, including Jimi Hendrix, The Who, AC/DC and Green Day, who are exclusive to Rock Band, as well