Speaking of that take, the Vocal only. I went out and bought it for that reason! The Special Edition is what im talking about. That vocal only track, well, while the vocal is very much to the fore, you can still hear the instruments. I now how difficult it would be to isolate just the vocal, but, BMG shoulden't advertise something that isnt exactly what they say it is!
As for other isolated vocals, not that I know of. Elvis made it difficult, because he preferred to record 'ive', with the band oround him. I know he put a few things down in palm springs for Felton at one stage, they may in the future be released as vocal only. But I'm not aware of any other vocal only releases.