All students of the Hellenic Open University (HOU) attend undergraduate and postgraduate courses at a distance. The lack of a live academic community is reported by many as a drawback in their studies. Systematic exploitation of new communication and collaboration technologies is desirable in the HOU but cannot be imposed universally as the average student's IT competence level is relatively low. In this work we present the methodology for the development of an integrated communication environment in which collaboration spaces serving as open communities play a key role in user engagement in the whole communication environment. To track and evaluate user participation we propose analytic metrics which, when combined with our detailed knowledge of the internal workings of user groups, provide concrete evaluation of the community online activity.