Thousands and thousands of software factories!
Over 100,000 to be precise.
For those of you that aren't aware, a software factory is an installable package of tools, processes and guidance that extends Visual Studio and optimizes it for developing a specific type of application, like an occasionally connected client or a WCF-based service. In practical terms, a factory provides capabilities such as wizards, templates, designers, code generation and documentation, and guides a team through the development process by surfacing tools and content appropriate to the task at hand.
Congratulations to the patterns & practices team on this accomplishment!