I use 3 macs, G5 at home, pb for travel/home and imac g5 in the office. Whats the best way to sync my ipod between them all 3 of them. Were if i rip a cd at my office and connected it to the ipod then after when i connect my ipod to my pb it will auto sync the ipod (add the ripped cd) by it self? I am not sure if this is possible but can i t be done? Off topic a bit - Whats the best way to back-up my music collection?