I think that is a weird choice from nvidia to restrict only the 8800 ultra to ménage à trois, the reason sli is worth it is to get 2 cheaper cards, or in this case 3 and get similar performace to the high end products, for less money, or to just be egotistical and get 2 ultras and gloat to your mates, 
Nvidia just shot themselves yet again 

ohh Nvidia where is overscan copensation you dimwitts
Try more like less than 0.5%
Last time I checked, the SLi market wass less than 5% so what is all the fud about?
I think that is a weird choice from nvidia to restrict only the 8800 ultra to ménage à trois, the reason sli is worth it is to get 2 cheaper cards, or in this case 3 and get similar performace to the high end products, for less money, or to just be egotistical and get 2 ultras and gloat to your mates, 
Nvidia just shot themselves yet again 

ohh Nvidia where is overscan copensation you dimwitts