This document discusses how Web 2.0 has shifted the balance of power from traditional media brands that control content creation and distribution to social media where consumers can participate in and influence conversations. It provides examples of how organizations and social movements are using social networks like WiserEarth and tools like Wikipedia, YouTube, and blogs to connect people and build alliances in support of social justice and sustainability issues. The document advocates for using these new media tools to empower communities and co-create a more just and sustainable world.