I have a jailbroken 2g Ipod Touch on 3.0, the Nike + app functions mostly the way it's suppose to as far as sensing, recording, playing playlists etc. All except I don't have the usual Trainer's voice giving me updates. It's just completely absent. Even when I hit home button in the middle of work out nothing. I've search and it doesn't seem anyone else has had this issue. Maybe I'll just have to restore and rejailbreak and see if that fixes it.