Now it can be told.
Or, to steal a little of Scalzi's writeup:
Right now the project has the working title of Metatropolis, although that’s likely to change before it makes its official debut. In this audio anthology, we look to a future in which cities have become something more than just cities — and what that means for the people who live inside them, and outside of them. The cities are not utopias or dystopias (that’s too easy), and they definitely won’t be the “future cities” imagined in the illustration accompanying this. What they will be is a different way of looking at the world.
Who are the writers who have built this strange new world and the stories in them? I’m glad you asked! They are:
Elizabeth Bear (Campbell Award winner, current Hugo nominee for her story “Tideline”);
Tobias Buckell (The Nebula-nominated Ragamuffin, the upcoming Sly Mongoose);
Jay Lake (Campbell Award winner and author of Mainspring and Escapement)
Karl Schroeder (Aurora Award winner for Permanence, author of the Virga Cycle)
I’m also writing a novella in the anthology, and serving as editor for the project, although at the moment, that’s been basically confined to reading the stories everyone else has been working on and saying “Whoa, cooooooooool.”