As someone with a large ‘electronica’ section in my music collection, it occurred to me how much I wish iTunes metadata system supported searching by samples. I can think of dozens of tracks that sample the different eras of Star Trek, and it would be nice to mine that kind of data. I suppose I could override the Composer field. You can stuff a lot of free form info in the comments field, but that isn’t searchable. Some day my computer will just find the source samples on the fly as I’m listening to something, and I won’t even have to manually fill all that stuff in. Hey, if it works for images with TinEye, surely someone will do something similar for music.