Originally Posted by James Morris 
Again, AMD has explicitly told me its native quad-core chips will be K10, not K8. That's from their Technical Director - Sales and Marketing EMEA, so isn't likely to be wrong.
My bad on that one, got drawn into the old K8L talk.
Originally Posted by James Morris The QX6700 is a great product, but it is just two E6700 sitting side by side in the same packaging and sharing the same FSB. There really is very little difference between that and sticking the two processors in separate sockets.
Except for the fact it offers a drop in upgrade for people already running the dual core derivative.
Lets face it people could (and some have) simply have bought a pair of dual core Opterons or Xeons if they are willing to pay out, but adding a second socket will always bump up the price because you are adding more components.
I used to run dual Gallatin-1M Xeons in my home system back in the days before dual core chips, it wasn't cheap but for the only way of having 2 cores at the time it was worth it. I wouldn't have bought it if it was a choice between that and a single dual core chip.