iCloud and FaceTime on 10.7.2, featuring the many colors of Chameleon

Quick post– I had sunk hours into trying to log into iCloud from my 10.7.2 Lion installation, but continually received this error: “This Apple ID is valid, but is not an iCloud account.” FaceTime wasn’t cooperating either (not that I cared, but it helps in terms of symptom diagnosis).  I immediately turned to the network…