Over 100,000 to be precise.
Take a look at Soma's recent announcement of this important milestone for the software factories initiative. It's exciting to see the growing interest in this portion of Visual Studio Team System.
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!