iPod shuffle Tips and Tricks
Subject:   songs from multiple iTunes libraries on one shuffle
Date:   2005-02-17 14:06:49
From:   sknaster
It turns out there is a way to do this. Basically, you mount the second computer's music as a shared volume & add songs from its library in iTunes. You can then move songs from both computers to the shuffle. Note that this does not copy the song files themselves to the first computer -- they're copied directly to the shuffle. More here.