One other shortcoming of changing the "Sort Artist" field - it cleans up your Cover Flow, but - unless there's something I'm missing - it messes up the listing of artists in your "Artists" list. When I tried this, my cover flow looked appropriate (the album only appears once in Cover Flow, in the section where the "V" artists would be, although it still shows the track 1 artist as the artist) but in my "Artists" list, it went through the alphabet appropriately until the "V" section, and in the "V" section, every artist who I had associated "Various Artists" with as the "Artist Sort" appeared again before the alphabet moved on to the "W" artists. Sigh...