I was talking to a CM on May 5th and according to him Space Mountain is "secretly" open a few times a week. He said that it was indeed ready to go and they are now doing test runs and surveying people about the ride. But it is only open for very short periods of time and it's never advertised. So check it out -- you might get lucky! He said that he had been on it and it was amazing. When I asked him if it was an entirely new track he said "Let's just say they couldn't build up, so they built DOWN -- way down!" So it sounds like it will be underground now as well as inside the original dome! I don't know how reliable that info about it being open once in a while is, but that's what I was told. I can't wait to finally ride it!
Ariel