I'll bet it was someone at the iPod factory using the volume image cloner to surf for you-know-what on some less-than-upstanding website.
For this virus to work it seems to depend on people actually having Autorun turned on or actually executing the file... and who would expect a pre-loaded file to be a virus?
(I remember a virus that made the rounds a while back that had me laughing my @$$ off. It came as an encrypted, zipped email attachment that someone would HAVE to intentionally decompress and run for it to work. Whoever got infected with it deserved it. But I digress...)