Diigo is about "Social Annotation", a superset of social bookmarking. We believe that the social annotation service provided by Diigo can really enhance your experience for online browsing and interactions, and for information gathering and sharing.
"network is decentralized, with each node—be it a tag, individual, or object—able to connect to another within the system. What arises, when enacted on a large enough scale, is rhizomatic: multiple points of entry for multiple participants"
"(...) has the most power and value in vertical search-style app.s, where a community of experts contributes to a pool of content that is then rated by other experts, assuring that the best available content is recognized and becomes readily available."
"Of particular interest are its application to categorizing content in developing fields, and allowing the navigation of content sets by browsing. (...) social aspects and implications of these community-created systems are also of great significance"