I'm just curious: I have a 3G scroll wheel iPod , which docks to my G4 iMac via Firewire, and my roommate is looking into getting the new iPod Mini. Can both iPod's coexist on the same computer? We both have our own separate accounts. Also, this may sound dumb, but, I don't know if my G4 iMac has USB 2.0 or the older version?