Network connectivity is provided by one Marvell 88E8056 via PCIe and one Realtek RTL8110SC via standard PCI. Gigabit Ethernet via PCI is not satisfying for an enthusiast board. An Agere L-FW3227-100 FireWire controller provides two ports of FireWire 400. Asus is using an audio codec from Analog Devices, namely the ADI1988B.
The case connectors are not colour coded, but ASUS provides a Q-connector panel. You can connect all the wires to the Q-connector and then attach this to the board, instead of having to fiddle around inside the case.
The configuration of the slots is not perfect, as using dual slot graphic cards means that two PCI slots will be wasted.
The heatpipe-construction keeps the temperature of the P35 under 60°C even at 1.55V . The extra cooling of the VRM part right to the CPU-socket did reach the 60°C mark. If not cooled properly the motherboard will have problems when overclocked. ASUS used heatpads instead of a better thermal compound. There is no chipset fan inclucded, so good case-cooling is paramount.