Sapphire is very busy and it looks like they will have a lot to show off at the upcoming Cebit show, since the new dual slot HD 3870 has just been pictured. This card uses a dual slot cooling solution with three heatpipes and a large center-positioned fan.
This new and rather massive cooler should be able to keep the temperatures on the low side, which means that Sapphire is may be going for the highest factory overclock so far, and the card should even have room for additional user overclocking.
The card's core and memory clocks are still unknown, but they are going to be revealed soon, since the picture of the card is already out. You should also expect a higher price tag for this card, since good dual slot cooling and factory OC usually has its price.