Stewart Wieck has died, just 49. One of the founders of White Wolf Magazine with his brother Steve and White Wolf Games, he worked on Vampire: The Masquerade and Werewolf: The Apocalypse before leading the creation of Mage: The Ascension. More recently, he founded Nocturnal Media, publishing Scarred Lands with Onyx Path and a new edition of Pendragon, as well as Darkling Plain, a boardgame with characters that animate when viewed through smartphones. Phil Brucato explains his legacy far better than I could.
My sympathies to his family and friends as well as my fellow fans.