Several of my "car rags" arrived in the mail last week. One of them has some more info. on the "Super Vette". Here's the highlights;
-Right now, the leading candidate for a name, ZO7.
-"ZO7" in the neighborhood of 700HP.
It was also written that once the C7 arrives, the "basic" C7 will have HP comparable to the current ZO6, and the ZO(whatever) will be around 700HP.

I'd take that with a grain of salt. But it'll be great of there's any truth to it.