Describes Corrente Viva, a network formed by 30 civil society organizations (CSOs) that develop social service activities in several regions of the Greater Sao Paulo area. Established in 2000, the network aims at strengthening its member organizations through the exchange of experiences and reflection among their representatives in a regional link structure--geographical subdivisions. It also seeks to accomplish projects that serve the shared needs of the participant CSOs through workgroup activities. Challenges include modeling a new institutional and governance shape for the network, avoiding shocks to the principles of shared responsibilities, controls, and decisions that originally led to its creation, along with the adoption of participative decision processes, and aiming to shun the centralization of power and the concentration of resources.