Dunno if you remember a post from a while back in which I proposed a process by which fan content could be legitimized to the benefit of all. Looks like the clever folks at Angry Robot books are spearheading the movement.
WorldBuilder takes that idea and moves it forward a billion or so steps (note: might not be a billion).
In January, when we publish Adam Christopher’s uber-cool prohibition-superhero-noir novel, Empire State, we’ll be inviting fan creators everywhere to visit the world of Empire State and create their own works of art based in the Empire State universe. These creations can then be uploaded to a dedicated website, and distributed under a Creative Commons license.
I find this to be excellent, and hope it catches on.