That senuti sounds like a great thing to know about. My understanding of how the IPod works is that everytime you sync it, it basically erases everything on there and reloads it from your itunes on your computer. Therefore, if you have nothing on itune on the computer, you have nothing to reload and your ipod would be aloverly blank. :cry:
I would make sure that your music gets reloaded on the computer before you sync it again. We had all 400 of our cd's on a hard drive and it went cuput! My DH had to reload all of them again. He wasn't a happy camper. Good luck!