Some are already spoiled because of Mobile Fidelity's stereo-only SACD program. "Brothers and Sisters" is definitely one of those, and I'm sure there are others also in that situation. Plus, I think you can throw out "Excitable Boy" for now, simply because Audio Fidelity released it as a stereo SACD a few years ago.
Finally, Universal's lack of participation thus far says a lot about the possibility of Multichannel SACDs from their library, including "Pretzel Logic"…
Voice of reason as usual..
It just hurts to think of all that wonderful music we'll never get to hear in surround..