Online gaming worlds going mainstream A music mixing game-within-a-game is part of Disney's new Virtual Magic Kingdom. Credit: Disney Related stories: Online gaming worlds going mainstream The "World of Warcraft" by Blizzard Entertainment has helped revitalize the massively multiplayer game genre. Credit: Blizzard Entertainment Related stories: Online gaming worlds going mainstream An early look at a redesigned "Tabula Rasa," from Ultima Online creator Richard Garriott's NCSoft. Credit: NCSoft Austin Related stories: Online gaming worlds going mainstream Turbine's "Lord of the Rings Online: Shadows of Angmar" game is due in early 2006. Credit: Turbine Related stories: