I like the look of that 8900GT if that information is true... Looks like it would beat the 8800GTS at a similar price. Then again the 8900GS also looks nice and I've had my mind set on the 8600 Ultra for a while now...
I would go with a 8900gs over a 8900gt myself if those specs are true. The gt is 33% more money for what looks like about a ~10% performance increase unless the gt overclocked more or something.
unless i missed something it's dual GPU not dual core and we've had dual GPU solutions for years. from the original Voodoo SLI to nVidia's SLI and the dual GPU 7800GT series.
No, I guess the 8950GX2 has the same idea as the 7950GX2. It's just two cards slammed together into one, so it only takes up one PCI-E slot. That makes quad-sli possible.