Well just when I thought I'd had enough of isolated tracks for a while, I stumbled across this extended vocal isolation track from Abbey Road. It's been on YT for a while, sorry if it's not new to you but it's new to me! http://www.youtube.com/watch?v=VrAdX4O1m4M
Another case of music I've heard hundreds of times, yet listening to this I hear things I never noticed or appreciated before. This is pure awesome. I know, not everyone cares, but if you like Abbey Road and haven't heard this before, give it a shot. You gots to listen to all of it too, including the silent parts.
If nothing else, some of the lyrics that never made sense or that I had wrong for decades are now crystal clear.