If there were a single new feature you’d want in iTunes 8, what would it be?

iTunes is mature, stable, and does almost everything I want. One feature request: annotatable playlists. For any playlist, I’d like to be able to add a description of the playlist, and for any track a note as to why I’d included it. It would be easy to implement, I’m sure Apple could make it easy to edit, view and hide. I want it for my own use, but I think a lot of people would value being able to publish this via blogs and/or social networking sites, and Apple could benefit from links back to the iTunes store…