This tutorial focuses on annotated bibliographies of online resources using Web 2.0 social bookmarking sites, particularly Diigo.com. The author discusses how and why to annotate bibliographies for a research project and how and why to use Web 2.0 applications to do so. It includes a YouTube video on how to use Diigo and it's capabilities for community sharing, and a slide show video about the author's use of Diigo and tips for annotating a bibliography. Real Player is required.