and by the way, Cray, used those AMD processors in the new jaguar supercomputer. And because of the six core opterons, they achieved the number one supercomputer in the world, even faster than the ibm roadrunner, wich also was based on opteron dual cores, with cell processors. Check the CRAY JAGUAR.
So why is amd not releasing those processors for consumers? i really dont know, perhaps its a diferent strategy, but believe me those processors are very strong, more powerfull than the core i7 and the core i9. And by the time, the core i9 will be released, we will have 8 and 12 cores opteron runing.