When we set up online systems for groups the specification usually includes 'forums'. These are online places where people who share interests can gather to share and exchange ideas, information and knowledge. However, forums are rarely very active. The next generation of internet tools (aka Web 2.0) offer new ways of thinking about linking people who share interests. The screencast below gives an idea of the possibilities.
This is just an idea. We'd be really interested to hear what you think.