Others too:
PLAYSTATIONCLOUD.COM - Sony Computer Entertainment America (not Gaikai, strangely)
Checking more now.
Edit:
PLAYSTATIONCLOUD.NET - Sony Computer Entertainment America
PLAYSTATIONCLUD.ORG - Sony Computer Entertainment America
.co.uk doesn't seem to be registered by Sony, but since they've got .com both with and without the dash they wouldn't need it.
PLAYSTATIONCLOUD.COM - Sony Computer Entertainment America (not Gaikai, strangely)
Checking more now.
Edit:
PLAYSTATIONCLOUD.NET - Sony Computer Entertainment America
PLAYSTATIONCLUD.ORG - Sony Computer Entertainment America
.co.uk doesn't seem to be registered by Sony, but since they've got .com both with and without the dash they wouldn't need it.