Please let us know what the kids think when they get the computers with aTunes.
I have about 30 gigs of music files (all legally downloaded or ripped) but I don't have an iPod, I have a Sandisk MP3 player. I've never used iTunes. So I don't know if there's something about iTunes that you can't get with a different music player--except buying from the iTunes store.
I manage my music between the Sandisk player and my Linux computers by plugging in the MP3 player, where it shows up as a USB drive, and copying the files to the MP3 player.
I'm very curious about the reaction of the kids. And make sure you know what they really think (if you can), not what they might say because they know where your own bias is.