iPod Backup
 

Can I reliably use SuperDuper! to completely back up my iPod, including Apple's voodoo music database, so that if the iPod's hard disk dies, I can refresh it completely?

For that matter, could I use it to refresh the old data onto a new iPod, were I to get one?

I don't see why you wouldn't be able to, but since the data came from a Mac, and you can always re-sync with that Mac, it doesn't make much sense. I don't think you'd be able to restore to a different iPod.