If you wander over to Prolink's stand at CeBit, you'll not only see NVIDIA's nForce4 for Pentium 4 on their stand, using EPoX's 5NVA+ SLI mainboard, but you'll also see the board running SLI using two 6800 GTs with different BIOS revisions. Check out this picture.
http://www.hexus.net/content/reviews...lld19JRD0xMDU4