If you have AppleCare for your iPod and they do not make your iPod any more, they will replace it with the most similar current iPod if it is beyond repair.
For example, if you had a 4 GB Mini, they will probably give you a 1 or 2 GB Nano. If you had a 6 GB Mini, they would probably give you the 4 GB Nano. If you had the 20GB 4G, they would probably give you the white (or black if they didn't have any white) 30GB model. If you had the 40GB 4G, they would probably give you the 60GB white (or black if they didn't have any whites or you got a nice genius and requested black
)
Also, please read my disclaimer in sig