new launch and new trains
Space Mountain will be launched on 09/04/2005 and from that moment the train will be shot from the bottom directly to the top. Apparently you won't notice the change (only if you are a huge fan).
There will be new trains, which will deliver a smooth ride sensation. The trains look similar to the old ones - just a little bit sharper at the front.
Once you are shot into the mountain you should be immediately in deep space - various projections should deliver a 3-D effect.
At the highest point of the mountain (a moon face projection is there currently) you will have the super nova scene and turn down right after it to escape.
The corkscrew part of the mountain will be change into a scene where you turn around a meteroite.
The track itself won't be changed and remains exactly the same.
Hope that these news give you some ideas.