from what I have read I am only 99% sure that the answer is no, so on the 1% chance.....
I have a test account where I tested a new application. I filled the applicaiton with useful data.
I then got a partner account, but of course I want to use my test db that I filled with useful data.
I have read that a backup and restore on the cloud is not possible.
I have a work around, but I can not imagine that other people do not want the same. Backing up and restoring db's for testing interesting situations is more or less standard practice. :-)