I've been hearing and reading in places that the unibody mbp is 32, and not 64 bit. Could someone with technical expertise regarding the actual specs (not just reading off a site or an article), care to elaborate? EDIT: I'm talking about the nVidia chipset itself. the chip is the new Penryn, and it's Core 2 architecture, and will be 64-bit regardless. The OS, Leopard, will be 64-bit (or partially). But the chipset itself? Kinda like when they had the first C2D MBPs. the chip was merom (64bit) but the chipset was 32bit.