PCIE ver 2 offers more bandwidth that's all, I wonder will the game take full advantage of that?

The incoming RV670 is a trim down version of R600. Just done the spec comparison. I doubt it can win against the incoming 8800GT.

R600 spec:
http://ati.amd.com/products/Radeonhd2900/specs.html
The specs between these GPUs are nearly identical to each other...
except some minor changes.

BTW, there is a 8800GT performance review (chinese website):
http://topic.expreview.com/2007-10-23/1193114539d6255.html

8800GT is v.aggressive too.

RV 680 = RV670 X 2.
RV680 is a single pcb with 2 RV670 on board...

actually I dont have high hope that incoming ati product win over 8800GT...
btw, new ver of 8800GTS coming soon.