Is my iPod dead?

I plugged my iPod nano (3rd gen) into my mac a few hours ago to charge. Just now, I looked over and the screen was completely blank. I reset it, but then iTunes gave me this message:

“iTunes cannot read the contents of the iPod. Go to the Summary tab in iPod preferences and click Restore to restore this iPod to factory settings”.

My iPod’s icon folder thing that shows up on the desktop is telling me that it’s still 7.39gb large (615.4mb free), but all the folders show up empty. The iPod screen, when I eject it, also tells me that I have no music.

If it’s just the iPod itself that’s dead, I can always buy a new one, but unfortunately, not all of my music is on this computer. Some of it I don’t even know where it came from. Plus, I share this computer with my sister, and I drag-and-drop rather than automatically syncing, so it’d be nearly impossible to filter through the contents of our music library to put my playlists and such back together.

Anybody have any ideas? :’(