have apple started shipping 2ghz machines yet? AMD's 2ghz Opteron is out, and the 2.2ghz Opteron is on it's way, as well as the 2.2ghz Athlon64-FX - So when will Apple release quicker cpus? normally it takes them at least 6 months before they change their computers, so how will the compete with the Athlon64/Opteron?