i dont think that this is ever going to happen "officially"But the way I see it from my point of view, until the day comes that I can walk into a Best Buy and buy any computer, and I mean any.. and be able to install mac os x on it, I'd rather wait until hackintosh installations become standard that way should I ever retire from a real mac, but wish to take os x with me, at least I can do it say on a 350 dollars laptop from HP or Acer for instance..
i guess time will tell, give it a go when the 2010 Macs come outWhat will be even more interesting is when the 2010 mac pro DOES come out, how one would be able to extract the microcode needed to run B1 stepping gulftown processors on the 2009's? That would certainly prolong any 2009 for many more years.. but, unlike the PC world.. this is not BIOS and its not some easy modification.. though my theory would be is to construct a efi flash utility to flash the microcode over to the existing efi firmware of the 2009s - enabling B1 to be recognized.. thus a 980x or its xeon equivalent would work on it.
A plan in theory, though I doubt it could ever be brought into fruitation.