It's worth taking a look at the MIT Center for Collective Intelligence.
They launched in October and will coordinate research and exchange of theories about what works and what doesn't in looking at collective intelligence. The directore of the center defines CI thus: groups of individuals doing things that seem intelligent. That includes everything from ant colonies, to wikipedia to the neurons in one brain.

They define their goals as follows:

While people have talked about collective intelligence for decades, new communication technologies —especially the Internet— now allow huge numbers of people all over the planet to work together in new ways. The recent successes of systems like...Wikipedia suggest...time is now ripe for many more such systems.

Our basic research question is: How can people and computers be connected so that —collectively— they act more intelligently than any individuals, groups, or computers have ever done before?

An adjunct to this site is their Handbook of Collective Intelligence, which is structured as a wiki. I found an interesting section there on issues which can hinder collective intelligence.

A final category of barriers to collective intelligence emerges from work on Dialogue by William Isaacs. He identified four failures of thinking that impede collective intelligence:

  • Abstraction/Fragmentation: The tendency to hold oneself separate or distant the world, e.g. by abstracting or compartmentalizing it.
    • Siloing is a symptom of this: “that’s an economics problem, not a psychology problem”; “that’s a marketing problem, not a manufacturing problem”; “Not invented here.”
    • “This is a unique case” instead of “this is a symptom of how the whole thing is working.”
    • Antidote = listening (to data, to people, to the “music behind the words”), principle of holographic participation – all things are whole, connected
  • Idolatry of Memory: The repeating of automatic routines, answers, stereotypes, and behavior patterns from memory.
    • “That’s just the way we’ve always done things around here”; “We solved that problem years ago”; “We have a human resources department, therefore we’re taking care of our people.”
    • Antidote = voicing  what is actually new and emergent in one’s understanding and experience; principle of unfolding potential – universe is always unfolding and producing the new.
  • Certainty: The “knowledge” that one’s view is correct.
    • “That’s impossible”; “There’s no way that could be true.”
    • Antidote = suspending one’s assumptions and prejudices for personal and collective reflection; principle of proprioceptive awareness – learning to see and feel how your assumptions are affecting your thinking and actions.
  • Violence: The disrespect, repression, and destruction of alternative points of view in order to force acceptance of one’s own understanding.
    • “You’re an idiot for believing that”; “No educated person could hold that perspective”; “That’s all well and good, but…”
    • Antidote = respecting diversity of opinion, style, knowledge. Principle of differentiation – diversity is natural and valuable, and collective intelligence means fostering differentiation and integration.