Diigo definitely has a place in education. Envision a group of students working on a Web-based research project: Not only can they cite the pages they’ve used, they can also have conversations about resources on the very pages they are discussing. And to take it a step further, the students’ teacher can join the group, view how the students are using the Web resources, and comment on their note-taking -- right on the sticky notes. As the site states, “Diigo is about Social Annotation.”