This paper introduces the research prototype called the Envisionment and Discovery Collaboratory (EDC) as an information technology innovation to enhance informed participation in planning. It represents some of our conceptual concerns for future collaborative technologies and their roles on how to: capture and integrated distributed knowledge, support stakeholders in articulating their own knowledge in a form that other people can understand, sustain the timeliness and utility of evolving information, and assist stakeholder to increase their shared knowledge in the context of collaborative planning activities.