Ok, see, there is a reason to have two iPods, though I would be a bit nervous about leaving it in there. Not just for theft, but because of extremes of temperature - it gets to over 100 degrees and 100% humidity here in the summer, and well below zero in the winter.
But yes, all of the music I have is on playlists - I never listen to anything outside of a playlist. Weird.
Zebra, that would be a cool idea.