hey im debating on wether to get a 2nd gen or 3rd gen ipod touch, maybe even a nano. but i have a few questions. is the 3rd gen touch 8 gig jailbreakable? and its only tethered rite? so if i turn it off i have to rejailbreak. so say that i accidentaly turn it off and i had apps from like cydia would they get erased? and is the 2nd gen touch only tethered or is it like a full jailbreak? also if i jailbreak do i lose all my music?