Research as a professional activity is currently undergoing extensive change triggered by new communication and information technologies. Even though the dissemination of knowledge is one of the main purposes of these technologies, their use in the production and evaluation of knowledge is equally important. In this article the author considers how, from a functional, symbolic and social point of view, researchers take up (or not) a public participative system set up by a scientific journal using Web 2.0 tools. She shows us the social as well as the epistemological implications of the use of this type of system for recording and publicizing science in the making.