It'll be good for you' isn't a compelling reason to get involved. Whether you are trying to involve community interests, funders or other collaborators you have to think about what's in it for them. You may be convinced of the value of new technology - but they need to see it from their own point of view. Informal networking and workshops described in the in the start up process in the planning section are a good way to do this. Online exchanges aren't enough to build relationships for online initiatives .
Online discussion works best after people have met face to face.
Brainstorming is much more productive in workshops. All but the simplest decisions still require 'real' meetings. Electronic communication is excellent for many things, but not for checking out whether you trust potential partners and can get on with people. Community organisations aren't the community . While community and voluntary organisations should be closely involved in any community technology initiative, it will be necessary to make direct contact with potential users, volunteers and other interests.