According to the guy in charge of Playstation Home, the virtual world has been a great success for Sony. Jack Buser, the man in question, told Gamasutra that "numbers like we have, it goes without saying that Home has been a huge success for our company, something that we have been very proud of."
"We've released over 5000 virtual items on the platform, and we know that once those items reach maturity, they are profitable. So you see us creating a tremendous amount of virtual items, because it is such a high margin business for us to be in."
Exactly how much money they've made isn't mentioned, though.