Garden Blacksun Base Free fan 2nd edition adventure for the Spelljammer Campaign Setting (webpage) http://www.rpgarchive.com/index.php?page=adv1&advid=43
The Flow of Fresh Brains Free WotC 3rd edition adventure for the Spelljammer campaign setting - web enhancement for Lords of Madness (1.89 mb ZIP of PDF). (This adventure is espcially good for introducing groundling PCs to the Spelljammer setting.) http://www.wizards.com/default.asp?x=dnd/we/20050520a
