There have been many breakthroughs in photography in the past decade or so--the digital camera, compact flash memory, and Photoshop just to name a few. We can now add HDR photography to the list.
HDR (which stands for High Dynamic Range) is a technique that combines multiple exposures of the same image in to a single image. There are many benefits to this technique, the biggest of which is that a photographer or art director can create images that have never been seen before.
Here is a brief example of a before and after of an HDR image. The first three images are the different exposures, and the final image is the HDR composite.