As a driver, I use video to capture the experience of driving as well as using it to critique my techniques. Digital Hero Camera is a new product that could make this a lot easier and less expensive than just about any other alternative. I'm looking forward to testing this on a GT-R in the next few weeks.
In related news, photo accessory giant Marumi has invented a clever macro photography light ring to provide a more natural, multi-point light source for close-in photography, especially portraits. Very clever.