If AMD could produce chips that stable at those speeds, they would and try to sell them.
The only reason Intel does not sell faster chips is they are not being pushed.
I read the thread and I saw nothing about stable chips at those speeds.
A few talking about booting. A few saying briefly "Prime Stable".
Not really much of any good news.
And to those curious about steppings, AMD already said they do not expect to have the B3 available until late Q1. So, no, this is not a chip that has the L3 erratta fixed. I'm not sure they have even figured out how to do that well yet. Remember, this erratta is one of the main reasons they kept reducing speeds.
They also cut the NB speed to try and fix it.
The linked article talks alot about how the chip really suffers under NB under 2.0.
Now, by supplying lots of power and lots of chipset cooling, they did get higher NB speeds, but again this is more along the lines of extreme cooling.
You are going to need to spend lots on the Phenom to make it match a 6400+ X2.