An update. Checked API listservers page today, saw below:
Ubuntu build "Installing"
Debian build "Powered On"
CentOS build "Powered On"
I was able to login to Debian build, changed root password and ran update. CentOS system does not respond to ssh or ping. Ubuntu system was in "Installing" state until a few minutes ago, when it changed to "Failed".
I had a ping monitor against all 3 IP addresses. The Debian system started responding a little after midnight, Ubuntu ~100am, CentOS never, even though CaC shows it powered up. The Ubuntu system still responds to ping, ssh connects, but login fails.
Another datapoint, Ubuntu and Debian built on DC-1, CentOS on DC-2.
So I have one system functioning, Woo Hoo!