I have a Gen 3 20GB iPod.
I haven't used it much ever since I got a iPod Nano because the battery life on my old one was way too short.
Just dug it up and plugged it into the power outlet and voila - it's still very much alive and kicking.
It really amazes me that after 3 years of dormancy it still works flawlessly. I think I shall find a home for it in my surgery.