Remember when adding the second processor on the mac systems was only about $250 extra? Beyond the R & D cost, the only extra cost of a multiprocessor system is for the extra processor and cache (I think). My guess is that apple could go compleatly MP on all of its high end machines (G4s not including powerbook) for only about $200 more than the current price. If Mac OS X can take advantage of MP systems nativly, then what is keeping apple from going compleatly 2 X G4 in the near future?? Or better yet, 4 X G4?? I am looking forward to something like this in the coming year.