New G5 Powermacs, some more stuff

As Apple put online the tech specs of the new G5s ( HERE), we manage to get a few more info on those machines.
For a start, while the Store won't mention it, Apple mentions a Geforce 7800 GT (we discuss it in the previous news item).
We don't know why this card was finally not sold, but it's a shame in our view.
You'll also learn that the G5 will not only use classical DDR2, but also its ECC version. For critical uses, this is a must, though it's much more expensive.
Yet the weakest point, as previously related in our news, is the fact of abandoning PCI-X et PCI. What will users of additional cards do ?
Either their investment will be lost, or the PCI-Express version of those cards doesn't exist.
To sum up, this machine came both too early and too late.
[Upd.] Apple abandonned the external AirPort and Bluetooth antennas. They're now built-in.
[MàJ] About system buses.
The new G5s now have one bus for two cores. Of course, this will limit bandwidth.
Yet, if IBM didn't change its CPU specifications, the two 970 MP cores communicate internally, using a very fast bus between them.
Thanks to this "detail", the impact of a single memory bus on performances should be quite minimized.