This may be off topic, but when you upgrade the software on the iPod Touch, do you lose all your save data for games? I already lost all my save data when I got my iMacAlthough I'm sure there was a way to avoid that. For future reference, how do you go about making sure you don't lose save data with a new iMac? a new iPod?
No your save data will stay in tact as long as you are updating. Restoring or getting an entirely new device will require a backup in iTunes to restore from, otherwise you're out of luck.