• What are the agents in a social learning network?
  • What are the roles played by these agents?
  • What are the interaction types they engage in?
  • What are some structures of interaction?
  • What design elements make the community palpable?
  • What welcomes the newcomer?
  • What sustains engagement?
  • How can we measure engagement? Shared meaning? Cognitive play?
  • What difference does it make when interactions are perceived as coming from peers, from authorities, or from the user interface itself?