I just now changed from IE to Mozilla and am trying to delete again. I'll let it run until quitting time and maybe have to admit defeat. I have contacted ZoomCloud via email before with questions to no avail.
Creating the cloud is easy. Placing the cloud widget code into the blog sidebar is simple. Having a working cloud is fun. Deleting an old cloud or getting answers regarding a missing cloud is more trouble than they are worth.
Update: Later that same evening ... before the football game (Go Steelers)
After two hours, the message had not changed. It looks like the cloud will remain despite my best efforts to have it removed. Just fabulous.