UPDATE --
I notice that this feature exists for knowledge base articles. When a knowledge base article is created and published for a company, there is an option to notify customers. I presume (although I have not tested this) that customers receive emails indicating that the article was published. Perhaps someone could clarify as to whether this occurs.
If this is the case, then it would appear that the engine or code is in place to extend this concept to a message that is "Blasted" to all customers of the company.
