Check out the first trailer for Vintage Tomorrows, a forthcoming documentary about the steampunk movement. Authors, including Cherie Priest and Cory Doctorow, join enthusiasts to explain just why people are so excited about this one strand of retro-futurism.

Their enthusiasm is pretty contagious. The arguments about nostalgia for a time when we were closer to technology, and the need to understand the past so we can imagine the future, are actually quite compelling. Plus it doesn't hurt that there are lots of cute costumes in the trailer. [via Cherie Priest, thanks Natalie!]