OCZ Gold DDR3. Going by the various posts I've read about it not working, the BIOS just can't make it sync, so never gets past a very early point in the pre-start sequence (the Striker II comes with an LCD BIOS display, it doesn't get past "CODE INIT"). I had pretty much decided to get some Corsair Dominator any how, but I wasn't intending to start buying it this month...
Addendum but, in a karmic sort of way, I had totally forgotten that the eBay vendor included a CPU with the mobo (and a whole load of other bits and pieces), and said CPU is a little faster than my Q6600. It's a Q8300, so 1,333MHz FSB and 2.5GHz core speed. Here's hoping it'll OC as well as the Q6600 does.