Sapphire is getting close to release a dual RV570 graphics card with internal CrossFire.
It sounds just similar to the Quad SLI GX2 cards from Nvidia. We have some pictures of the card and the card running a 3Dmark.
The card has two power connectors and a huge heat pipe cooler on top of two chips but just a single fan.
We don't know how well it performs, but Sapphire will probably show this card off very soon. It is longer than the motherboard so it is probably at least as big as the 7950GX2 card.