So, I just tested my iPod Nano on my G3 iBook Clamshell running OS 9, my iMac G4 running Tiger, and my Power Mac G5 running Leopard. Here are my findings: IT WORKS!!!! 
iTunes detects it, on the G4 and G5. Of course they both say that I need the 10.7 version of it. However, I can see the actual iPod via Disk Mode, and can write to it. And boy is it FAST!
Oh, and Finder freaked out on OS 9 and forced closed.
But you can at least charge it using USB 1.0.
So, basically, we were all pretty wrong about the driver support. All it is is a super fast USB cable (that can push 3GB into the iPod in less than 2-3 minutes!!!!) that's reversed engineered.
So, if you guys want to try and add the compatibility to the older versions of iTunes, it wouldn't hurt.
iTunes detects it, on the G4 and G5. Of course they both say that I need the 10.7 version of it. However, I can see the actual iPod via Disk Mode, and can write to it. And boy is it FAST!
Oh, and Finder freaked out on OS 9 and forced closed.
So, basically, we were all pretty wrong about the driver support. All it is is a super fast USB cable (that can push 3GB into the iPod in less than 2-3 minutes!!!!) that's reversed engineered.
So, if you guys want to try and add the compatibility to the older versions of iTunes, it wouldn't hurt.