NewEgg and Amazon have had them. They are out right now(except for overpriced resellers). The boards keep coming in and out of stock. I have been able to get 3 of them over the past 3 weeks. Keep checking and you will get some.
So far I have only created 12 gpu AMD rigs and they work great on Ethos hashing eth at 361mh around 1600 watts at the wall.
What processor are you currently running in your rigs if you don't mind me asking Smilee? I just grabbed one of these boards myself.