The document summarizes key concepts of Library 2.0, which focuses on user-driven services and participation. It discusses how user behaviors and expectations have changed with new technologies. Library 2.0 emphasizes interactivity, user contributions, and treating information as a conversation. The document provides examples of Library 2.0 tools and services like blogs, wikis, tagging, and IM that can increase user engagement and participation. It offers guidance on starting a blog or IM reference service for a library.