They had to be put on the iPod somehow, no? The default way of getting your music on an iPod is through iTunes, no? So if the songs were transferred from the computer, then they should still be on the computer... ie: no reason to transfer back from the iPod.
Now, if that's not the case (ie: not transferred from this computer, or songs gone due to hdd crash or something), then something like Anapod would be perfect.
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