AppleInsider is talking about Apple and Quad core, Dual proc (8 core) Mac Pros. these are rumors at the moment, but would be easily posible. I posted a link to a Anandtech article (direct link to article here) where they stuck 2 of these Quad core chips (engineering samples) into a mac pro and it worked. Next question though: Will the non engineering sample version of the Quad Core Xeon work on a Mac Pro? Next question after that, where do i get a new Xeon board for my 2 old (well, not that old) Xeons that would be taken out of the Mac Pro and used else where?