This document discusses how Web 2.0 technologies can make libraries more efficient and offer new services. It provides examples of libraries using blogs, instant messaging, photo sharing, podcasts, wikis, customized search engines, online calendars, movies by mail, gaming, and blogs to engage users and share content. The goal is to show how these new tools can level the playing field for small and large libraries, make librarian jobs easier, and allow libraries to offer new services with minimal extra effort.