I remember a while ago all the icons under Devices with Removal Storage were the same. After a windows update (i think it was a mass storage device update), all of my icons changed to more intuitive icons (a new ipod icon just like yours and new icons for removable drives like my memory stick).
I still have the icons except for my ipod icon, which changed back to the origial one. I want it back.
One suggestion though: go to the ipod drive's properties, the customize tab, and change the folder picture. Changing the icon doesn't work for me, but try it.