About the 'e-4WD' set up on the next GT-R, it was made very clear last year ('05) about the cars FR transaxel, which to me sounded like an about face on the rumours that the car would be 4WD at all... having said that though, I think (some kind of) 4WD system is on the cards and always has been.
If you have a look at Mitsubishi's development with their 'MIEV' technology (placing an electric motor in each wheel), Nissan would be crazy to invest in traditional 4WD system now... thats assuming the car with include 4WD. But you never know, I've followed the Japanese press for a number of years now regarding the next GT-R, and really the only thing you can be sure of is that the GT-R will be the best possible sportscar made by Nissan under the current leadership... if thats not enough to topple the 997 Turbo then blame that Brazilian guy from Renault...