It looks like ECS is going to try to bridge the gap between Intel and AMD motherboards by allowing a user of their PF88 board to use…BOTH.  I have a couple of Asrock boards here sporting both 754-pin and 939-pin Athlon 64 sockets, and the results have been somewhat lacking, but we’ll see what ECS has to offer.
The mainboard has 4 slots for DDR2 667, a 1066FSB, SATA2, GigaLAN and 1394a Firewire. When in place, the SiS965 Southbridge is shared with the converter card which is based around AMD socket 939. The card has it’s own dedicated SiS756 Northbridge, 2 slots of DDR400, power management circuits and a FSB2000T. These are all needed to run the AMD K8 technology.