I know we are a rare breed, but for Rotary fans, Mazda has a super cool site that gives you the front to back history of Felix Wankel's, wonder of engineering, the Rotary engine. Looks like the 13b will be replaced with a new engine called the 16X in a yet to be named ultra light sports car. I can only hope they go back to the mystique of the awesomely cool 79-85 rx-7. To this day, I do not think I had a purer car, than my '84 GSL SE 13b model. Definitely worth a look at some of the cool stuff, and some of the abominations that ended up Wankel powered.
http://www.mazda.com/mazdaspirit/rotary/graffiti/