Here's the trailer for an upcoming O'Reilly book, called Vintage Tomorrows: A Historian And A Futurist Journey Through Steampunk Into The Future of Technology, by James H. Carrott & Brian David Johnson. (Hi Cory!)
This book walks through the Steampunk movement and what their alternative history says about our own world and its technological future. It includes interviews with experts such as Cory Doctorow, James Gleick, and Margaret Atwood, who talk about how Steampunk has become a cultural movement.The authors have also just completed a documentary by the same name. You can see the trailer here
