The P5K3 Premium/WiFi-AP motherboard should be ready in two to three weeks and this Asus motherboard comes with 2 GB of onboard DDR3 memory.
Furthermore, Asus guarantees that the memory they are using will overclock all the way to DDR3 1600, probably with low latency settings. The board looks promising with the only low point being that you won't be able to add more memory, as the board doesn't have any DIMM slots on it.
Anyway, it doesn't look like many people will go for more than 2 GB of memory and next year you will probably want to exchange your motherboard and CPU anyway, as Intel will likely go to FBS 1600 MHz and this is expected in 2008.
Published in Motherboards
Asus integrated DDR3 board to hit DDR3 1600