Just took some good quality screenshots from the teaser. With these and the video of the Camo'd car in GT5 as well as pics from it, we can really begin to do some digging.
Looks like the front left, Shape leading edge to the Front lip of the car.
A small look at the stitching on the door
Tricky shot with what looks to be louvers, perhaps in the Hood?
Unmistakably, the Grille
To the best of my effort, a shot of what looks like a lack of the usual Corvette hood budge
Having a very hard time with this. After studying the lines of the spyshots and the video, I think this could be a vent near the rear window
Edit: Disregard, its just the exhausts.
To those who were hoping for the round Tail lights to return, It looks like they aren't coming back.
Also, Some spyshots
here. Most interestingly, theres a picture showing a whole lot of these C7 prototypes in one setting.
EDIT: Found this interesting info, apparently, that teaser isn't the only one we're supposed to see:
The first, called “Conception” will be available by November 15, just under a month from today. The second will be “Calibration”, and will be revealed on November 29. “Craft” will be unlocked on December 13, while the final video, “Creation” will be shown off on January 10, 2013 — just days before the official unveiling of the Corvette C7 on Sunday, January 13, 2013.