This document discusses how libraries can utilize emerging Web 2.0 technologies like blogs, social networking, tagging, and user-generated content to better engage with patrons. It outlines the key aspects of Web 2.0 including RSS, tagging, comments, user content, and friending. Examples are given of how libraries can use blogs, social networking, wikis, instant messaging, podcasting, and videocasting to communicate with and reach patrons in new ways. The goal is to extend libraries beyond their physical spaces and run both physical and digital branches to build unique digital services and conversations with patrons.