Microsoft documented their findings from "eating their own dogfood" when they deployed Office 2007 internally. They’ve documented their findings and are sharing a guide on how they deployed the product on their network.
"Deploying the 2007 Microsoft Office system has provided Microsoft IT with the opportunity to test improved deployment tools, which are designed to simplify the enterprise rollout of applications. Microsoft IT discovered that features such as the single build folder and single customization patch resulted in a more efficient deployment solution. This helped to ensure fully-tested deployment scenarios, before the public release of the 2007 Microsoft Office system. These features also extended the productivity-enhancing benefits of Office system applications throughout the company".