Well they are either holding it back , so they have something to show and in some way overshadow NV release , or they holding it back because of driver issues.They did a live demo with it but it could be either really . Just speculation on my part did not really hear anything about it for some time now.
I have a low budget, but I am using eyefinity right now. I had only spent a little over $300 to get it up and running. $160 for the 5770 and I bought two 21.5 inch lcd monitors from Staples for $75 each. I also had to buy the monoprice displayport/vga adapter, but that was only $22. I ended buying a third monitor from Staples so I could have three of the same monitors. I could sell my old 22 inch hp monitor for about $150 that would end up paying for two of the new ones. I can tell you triple monitor gaming is awesome. I hope I never have to game with a single monitor again.