Overclockers has the Gigabyte GA-X38-DQ6 (Socket 775) PCI-Express DDR2 Motherboard listed and you can pre-order one for a saucy £187.99 including VAT. This is the same board that we mentioned five days ago here.
The company went one step further and said that the ETA (Estimated Time of Arrival) of these boards is the 14th of September, that's only ten days from today. No one dares to list X38 DDR3 motherboards, but we are sure that they will be unveiled in the next few days.
Getting a DDR2 X38 board doesn’t makes much sense as the real power of this chipset is on the DDR3 memory side, but who knows DDR2 version might be a better overclocker than P35 DDR2. W should know that soon.