machine and "De-Authorize" the iPod on that machine.
Before you do that though, set the preferences to sync Manually, NOT automatically.
Then, when you computer finally recognizes the iPod, it will not download an empty playlist and delete what is on there.
Now, do we have to guess what OS you are running, or whether you are connecting via Firewire or USB. USB 1 or 2.0
Such a lack of information does not help those that feel inclined to help you

P