This document provides an overview of key concepts and tools related to Web 2.0 in 30 minutes or less. It defines Web 2.0 as focusing on user collaboration, contribution and community through tools like blogs, wikis, RSS feeds, social bookmarking and networking sites. Some key concepts discussed include individual production and user-generated content, harnessing the power of the crowd through collective intelligence, the architecture of participation through open platforms, and network effects like power laws and the long tail. The document concludes by considering the implications of these changes and encouraging participants to explore and engage with Web 2.0.