I'm about to jailbreak my 2G iPod Touch for the first time. I'm assuming it will delete all the apps and music that I've got on there now, is that right? The real question is, can it be backed up and restored after the jailbreak? I've got XpenseIt installed to do expense tracking, and it's got a bunch of records entered. Is there a way to back that data up, or will it be unrecoverable after jailbreaking?