nope, the macbook pros are like the old PBs and iBooks, w/ the CPU soldered to the motherboard. the iMac on the other hand is socketed, but i'm not sure offhand if the pin count and configuration will be compatible. intel usually does little to provide an upgrade path even within CPU families (pentium 4 cores for example). i'd guess that they won't be upgradeable as intel has to add 64-bit capability for merom yet. then again given the quick turnover from yonah to merom/conroe it might be more financially feasible for them to stay w/ the same chipset as u mentioned. guess we'll have to wait and see.