Interesting notes collected:

RV770 architecture image shows a "Cr..." blocked by the PCINLIFE.com mark on the image. Some at b3d are speculating it means "Crossbar" - and at the end of it, it is connected to a module called "Global Data Share." Also of note is that the picture shows "CrossfireX Port." Neither were seen in R600 and seem to add credence to the idea that R700 is more than just CF on a card.

Also from the extremetech review of the GTX 280, Jason Cross, the editor wrote (bold emphasis):

Then there's the question of what ATI has up its sleeves, given that they're on the verge of releasing their new graphics cards based on the new RV770 chip. ATI tells us they're not going to compete in this really high-end of the market with those products.

Rather, they promise we'll get close to the performance of the GTX 200 cards (say within 20&#37 at dramatically lower prices and power. Certainly that targets a much larger segment of the market, but the worth of that strategy all hinges on its real relative performance. For the high-end, ATI is still a couple months away from the release of their card containing two RV670 GPUs.

We don't know what shape that will take, only that it will combine two GPUs on a card in a substantially different fashion than the Radeon HD 3870 X2, and that ATI tells us that with not-yet-fully optimized drivers it already scores over 6,000 in 3DMark Vantage on Extreme settings. We've heard promises of future greatness before, and reserve judgment until we get the cards in our own hands to run our own tests.
Source

He claimed to have met ATI last week on the B3D forums and has been reliable about these kinds of things before so I see no reason to doubt him.

These next few weeks will be interesting! I love summer GPU wars