Ok, I asked this question before but no one answered. As I've built PC's back in my Windows days, I know that most motherboards (i.e. Mac Logicboards) can be upgraded with newer/faster chips assuming the chip matched the boards socket. There has been talk that a few Mac Pro users/developers were able to take out the dual core chips and replace them with two of the new Intel Quad Core Processors, thus producing an Octo Mac Pro (which is assumed to be announced by Steve Jobs as a new addition to the Mac Pro line). As a current Mac Pro 2.66 owner, will this be possible with my system? That is, when Apple switched to Intel Processors, did they also begin using motherboards that would be on par with a PC system [and thus upgradeable]? Thanks.