The term "Community" is beginning resonate across the increasing number of conversations centered around the growing appreciation of the Semantic Data Web Vision. I've been troubled in the past with the once growing tendency to disconnect social networks from Graph based Conceptual Data Models as expressed in the underlying infrastructure (Data Management layer) of many first generation social networking services.
Last week, John Breslin published a post that contained a very nice presentation of what is best described as "Objects of Our Sociality". The presentation provides insight into the elements that collectively drive the creation of People & Data networks (communities). The presentation certainly unveils the often forgotten fact that although People & Data network construction is always socially driven, our intentions aren't always amorous :-)
At the core of the Semantic Data Web vision is the desire to leverage the "network effects" that communities provide, while exponentially reducing the cost of knowledge creation, discovery, and exchange in the process.
In short, the Semantic Data Web ultimately enables us to collectively do our bit for a greater good! Thus, quoting TimBL, "you do your bit and others will do theirs" :-)