The aim of this article is to scrutinise the participative processes enabled by social media services in the collaborative rewriting of the Icelandic Constitution. The Constitutional Council creating and presenting the bill made use of Facebook, YouTube, Flickr, Twitter, and its own stjornlagarad.is site to encourage and ensure engagement and participation by the general public in the rewriting process. This article presents the participating citizens as a weak networked public, the Constitutional Council as an intermediate public, and the members of Icelandic Parliament as a strong public. Despite open structures and the facilitation of information, statements, and in some cases deliberation, the communicative efforts of the general public remain in the form of weak publics belonging to the cultural public spheres since decision-making still takes place in the ‘upper’ structures of political public spheres.