http://theinquirer.net/default.aspx?article=37484

WE LEARNED one more critical detail about the R600. The chip can and will support Quad setups. It will work with four cards. ATI has been working to solve the four card performance problem for a while. Nvidia tried it and we tested the Quad SLI with two 7950 GX2 cards but we got super lame performances out of it