I'm on vacation for the summer, away from my home computer with my iPod, and I was wondering if I will be able to upgrade a jailbroken iPod Touch. I have all my music and videos on a flash drive, but the only problem is that I bought the JSU way back when, and my iPod of course was synced to my home mac. So my question is, will I be able to do a restore of my iPod here, and upgrade to 2.0, or will doing this cause me to lose the JSU? Thanks for all the help.