This document discusses libraries and their online presence and use of social software and online communities. It covers topics like egosurfing, online communities, photo communities, wikis, memory sharing communities, blogs, and Web 2.0 applications. Specific examples mentioned include Library 2.0 communities on Ning and Hyves, a wiki from the Oude IJssel library, the BBC Memory Share site, and blogs from various Dutch libraries. Risks associated with communities like copyright and spam are also addressed.