Our chap used PC6400 C4 memory and managed to get 2GB of the memory working at an amazing 1250MHz. We reached 11843 MB/s in Sandra benchmark - almost twice as much as you would get with Intel's 955X chipset with PC 5300 memory at CL3.
Corsair can brand this memory as PC 9600 and will be ready to ship in a month or two. The chap was using Asus AM2 board powered with Nforce 5 and managed to overclock Athlon 64 FX 62 at 3129 MHz. The FSB was running at 312.9 MHz and you actually do need this kind of the speed to show the real teeth of this memory.
At 626 MHz or should I say 1252 MHz in DDR mode the memory runs at 5-5-5-18 timings at 2T command mode. This is indeed the fastest memory to date but it will take a month or two before you see those in retail. Corsair uses active cooling on top of the memory and here is how it looks.


