I've been making mix CD's and uploading the album info to Gracenote CDDB for years. That way when I give out my CD's it neatly names the artists and tracks on their PC's and/or iPods/iPhones. If it's a mix cd or custom compilation there will be various artists on the disc. When you are submitting the info to Gracenote CDDB it asks you for the album artist. I found that inputting "Various" would then let the CDDB list the multiple artists found in the id3 tag info.
That was until I submitted my newest disc Yacht Rock 2. Check out the Artists listed. RETARDS !!!

On the left is the correctly named predecessor disc I submitted last year.