Zotec have announced that it plans to release a Nvidia GTX460 with 4 monitor outputs comprised of 3x Displayport + 1x DVI-DL on a single card.
The card will have a clock speed of 710MHz and 2GB of GDDR5 VRAM
The card is to labeled "ZOTAC GeForceĀ® GTX 460 3DP"
With a maximum supported resolution of 6400x1200 with 4 monitors, or 4800x1200 with 3 monitors on the displayports.
Initial indications would seem that the card simply splits the 2x DVI-DL (2560x1600) pipelines into 4x DVI-SL (1600x1200) outputs as the displayports are limited to 1600x1200 each.
Source.
As good as the GTX460 cards have shown them selfs to be, I cant help but think that I dont really see why they would do this with the GTX460, as when you start to bump up the res you are going to need the extra grunt that the 470/480 would be better at providing, while also supporting Tri-SLI for a further boost.