To follow up on my recent post on HDR photos, I've found some HDR movies, put together by Chad Richards. These are unbelievable.
Twin Peaks San Francisco Sunrise (HDR time-lapse) from Chad Richard on Vimeo.
Utah & Arizona Compilation from Chad Richard on Vimeo.
Here's a How-To (basically take a ton of HDR photos over a period of time and combine into a movie)
ABC News Coverage