According to this post on the TribalWar forums, the single-player Tribes: Vengeance demo promised for this month is being released tomorrow. There's no word on exact contents, but look for it around noon. Thanks Blues News. Update: the beta release of TribesEd is now available. Update 2: GameSpot has some more details on tomorrow's demo. It will be a 374mb download, and includes one singleplayer mission.