Today Microsoft has finally released the final version of the DreamScene animated wallpaper Ultimate Extra.  It is starting to show up on Windows Update for those that have Windows Vista Ultimate Edition under Ultimate Extras.  Unfortunately, I do not yet see it listed on my computer.

Update: It turns on that there may be an issue with installing the final version of DreamScene for those that are testing Vista SP1. The final version of DreamScene is not showing up in the list of Ultimate Extras for any user that installed the latest build of SP1.