I remember hearing that Mp4 might be included in iTunes in the future. Will I be able to convert my existing library to Mp4 or will I have to rerip all of my Cds? And will the iPod be compatible with it, will it simply be a software upgrade? When may be see this, the reason I ask this is because I am running out of space on my iPod and I dont have enough green for a new iPod. Any help would be appreciated!!! Thanks in advance!!!