iTunes and playlists

So I had a question for the community about their music libraries. I’ve got all my music in digital format playing through iTunes. Currently I’ve got three machines I work on daily and I’m having a hell of a time keeping consistent libraries, song ratings, etc.

Does anyone know of any way to keep redundant music libraries like mine keep consistent playlists/song ratings? I tried exporting and importing the iTunes library…but no ratings are transfered, only playlists.

I figured I can’t be the only one out there with music library woes…what would everyone suggest? My first guess is people would say go buy a 60 gig iPod…which I don’t really wanna do. Any other options or ideas?