DJ Mugen – Infinitely Danceable

Great utility here:
http://www.mulle-kybernetik.com/znek/public/en/default/software/iTunesFS/index.html

Lets you mount the iPod on the desktop (on a Mac) and see the MUSIC as a separate filesystem. This is not the same as using the iPod as an external hard disk. Instead, it allows you to copy your songs from an iPod synched with another computer. Super useful.