The document discusses the concept of Web 2.0 and how it relates to libraries (Library 2.0). It provides examples of popular Web 2.0 sites like Flickr, Delicious, and Digg. It also lists typical design features of Web 2.0 sites like simplicity, central layouts, bold logos and colors. Finally, it discusses how some libraries are adopting Web 2.0 principles through blogs, tags, and virtual branches.