MultiTunes

Not competitive with alternatives like iTunes Library Manager and Libra, both of which can assign unique preference files to each library, something that cannot be done with iTune's built in multiple library function. Extra bonus: ITLM and Libra are both $10.

Though its price is absurd (should be free, compared to many others...), it's simple to use once you've set things right and integrated with iTunes. You've got to tinker a bit so set-up libraries if you already have existing ones, but once you're done, it's very pleasant to use and becomes quite invisible. For those of you reluctant about the price, it looks like you can use it for free provided a nagging window which remains more attractive than launching an app... ;-)

Not competitive with alternatives like iTunes Library Manager and Libra, both of which can assign unique preference files to each library, something that cannot be done with iTune's built in multiple library function. Extra bonus: ITLM and Libra are both $10.

Not sure what your getting here for the money but it looks like you sort things into folders. I can do this in iTunes already. Have you tried Libra http://www.macupdate.com/info.php/id/13728 its cheaper and works with external locations. The website says that it will run under Rosetta and that an Intel version will be available in October.

I can't get it to remember the names of my libraries when I rename them (even hit SAVE). Would love a better setup menu where you can click NEW and select a name and folder where the library exists. I have 3 libraries, 1 on the local drive and 2 on a Lacie USB drive.

works only with english localization. Go to "System Preferences / International" and put "English" at the top of the list.