TPU found some photos of the upcoming ASUS P7P55 EVO motherboard, which has some more features than its cheaper brothers:
The CPU is powered by a 14-phase power circuit. Additional power management is provided by the ASUS EPU chip. The expansion slots include three PCI-Express x16 slots.
The first two arrange as (x8, x8) electrically, while the third one is electrical x4. Two PCI-E x1 and two legacy PCI slots make for the rest of the expansion. The connectivity options of this board will include support for SATA III. Apart from the six SATA ports the P55 PCH provides, an additional Marvell 88SE9123 two-port PCI-E SATA III controller is present, which also provides an IDE connector. Apart from the 8-channel audio, Firewire, and 14 USB ports in all, there are two gigabit Ethernet controllers.