Oh yeah, "We've Come so far". It's used at Space Mountain in Florida. They play a jazz version in the entrance where there are pits of balls beneath. I'm not sure how many versions of the song Disney recorded, or if there are any lyrics to the tune, but I got 3 versions of it on a Walt Disney World Forever CD about 5 years ago. One is the jazz version used in the actual attraction, the other is a softer, slightly slower version of the first, and the last is a version played on a synthesizer played entirely with what I suppose are supposed to be "starlight twinkling" noises. I've never heard the last two versions used in the actual attraction area.
Which reminds me, there are two Disney World songs I'm looking for. The first is a complete version of the ambient synth loop played in the star tunnel at Space Mountain in WDW, which has no com chat or melody, and sounds much more modern than the Disneyland versions, and the other is the spanish guitar loop you hear near the chess-playing skeletons at the Pirates of the Carribbean queue.