http://www.nordichardware.com/news,7356.html
If these postings are accurate, Nvidia has a lot to fear. If a SLI 9600GT solution is beating their own top end 9800GTX, things will get interesting. Crossfire is much better and more flexible then SLI and now ATI will be designing to their advantage.
Everything is still rumor at this point, but it's still fun to speculate while holding a 7900GT.