Two new movies/simulations of the co-evolution of downtown Minneapolis and its skyways system have been postedhere
These are large movies (132 and 137 MB), so be forewarned.
These are based on research done by Michael Corbett as part of his MS classwork and Feng Xie as part of his PhD. The research paper underlying this can be found:
Evolution of the Second-Story City: Modeling the Growth of the Minneapolis
Skyway Network to be presented at the upcoming World Conference on Transport Research in Berkeley.