I've seen a couple, one black and a mate has a white black edition.
awesome, awesome car ZERO lag, gearchange in something stupid like .3 of a second...he also has an R34 with 535WHP, the GTR pumps it when nailed side by side, but i'm quite confident as the 34 makes more HP it will reel it in as the revs rise as it's seriously quick once it gets going!