This document discusses how companies can benefit from open source communities. It argues that open source is not just for geeks or moochers, but is a model for innovation. Open source communities provide feedback, testing, content and development assistance. Companies should build communities by starting small, being welcoming and inclusive, listening to members, and having an open development process. While challenging, community can set companies apart, redefine markets, and inspire loyalty if made a core part of the business.