Just bought 2 Touches from Target and I want to make sure they are the latest and greatest and I have no idea ho to tell. Is there a serial number decoder on here someplace to tell me that I got the latest software version? I tried searching but my keywords may not be correct. Is there any hardware differences between G1 and G2?...forgive me...I am new here and trying to learn as much as I can before Christmas when these are given to our daughters...but I just want to make sure we got the latest stuff out there. I would assume Target is selling the latest but I hate to assume... Thanks in advance. Joe.