Jeff at Imagine Echoes has a very interesting topic going on, check it out.
This is not really related but I'll throw it out there since he mentioned this album in his post:
This was one of my ALL TIME FAVORITE albums. I really miss vinyl because often the cover, back cover, and both sides of the inner sleeve were covered with interesting artwork.
ELP had all kinds of things hidden in this album art, you could look at it for weeks and still find hidden meanings behind it all. Cool.