The document summarizes key points from a presentation on social learning 2.0: - It discusses the affordances of new technologies like massive online content, low-cost communication tools, and intelligent agents. Emerging pedagogies like connectivism are also examined. - Models of learning interactions are presented, including the importance of learner-teacher, learner-content, and learner-learner interactions. Groups, networks, and the collective are identified as levels of social learning granularity. - Applications of social learning 2.0 in formal education, organizational learning, and personal learning environments are discussed. The use of groups, networks, and the collective at each level is described.