This document discusses building vibrant and purposeful virtual learning communities. It provides examples of both successful and unsuccessful virtual communities and analyzes the factors that led to each. The key factors that contributed to success included having a clear purpose, strong leadership, engaging activities, and effective tools to facilitate collaboration and connection among members. Factors that caused communities to falter included a lack of these elements as well as insufficient governance structures and ownership. The document advocates for combining professional learning communities, communities of practice, and personal learning networks to provide different contexts for knowledge sharing and development.