Not actually a Wiki, but similar in concept: 'Earth2100.tv is a project by ABC to solicit ideas from the public and experts about the dangers facing world in th

Not actually a Wiki, but similar in concept: 'Earth2100.tv is a project by ABC to solicit ideas from the public and experts about the dangers facing world in the next 100 years. "The world’s brightest minds agree that the “perfect storm” of population growth, resource depletion and climate change could converge with catastrophic results. We need you to bring this story to life."'