Now, I'm not that sure about my CPU knowledge, but as I understand the new Nehalem processors can use triple channel memory (instead of dual memory used by the C2D Macs). So why does the new Core i5 or i7 iMac have 4GB of RAM standard? That's not divideable by three, so I'm guessing they're not using the triple channel thing. If you remember, the Mac Pro's do come standard with either 3GB or 6GB RAM. I dont geddit...