Bad news seems to be that the Ryzen 1800X and the high-end motherboards are all sold out for right now at Newegg and Amazon. And its not totally clear when they will actually become available.

My Ryzen 1800X is to be delivered today. Then, I need only the motherboard to finish the build. However, my ASUS motherboard has not shipped from Amazon. And, I got my Amazon pre-order in during the first few minutes on February 22 morning. Now, I see there are no alternatives -- but to wait.

EDIT: Bright idea. I checked for ASUS Crosshair VI "customer/buyer" reviews. None. Maybe no-one got theirs yet. One site indicated March 9 for shipments.

EDIT2: My Ryzen arrived