Does anyone know if iTunes has the functionality to tag songs with more than just a few labels? I'd like to tag with a number of different labels: Say "classical", "instrumental", "solo organ", and "Halloween" for Bach's Toccata and Fugue. But right now I can only tag the Genre and use Grouping for an additional tag. (I can also use the Comment cell and a few of the other cells to hack it a bit.) It would be nice if iTunes had a feature to attach as many labels to a song as I would like (a la YouTube, gMail, etc.). Anyone know if this might happen in the future or if there is a way to do it now?