This article and video has the most info on SkyActive I've seen. Please sticky this post or set up a forum to discuss SkyActiv. Mazda is revolutionizing the internal combustion engine. They've focused their engineering efforts on a vehcile that makes the most out of a gallon of gasoline. They have not spent money on hybrids, electric vehicles, hydrogen, or other green tech. They've just designed the most practical solution to energy concerns.
And it looks like a blast to drive! Mazda SkyActiv Prototype Review: Car Reviews