Several publications explore the potential use of web based technologies to enhance public involvement in spatial planning and design, for instance in the form of online visualization tools, serious games, so-called argumentation maps and crowdsourcing ; all advocating further development of such technologies to enable online participation and collaboration in planning and design. The extent to which existing platforms, such as social networking sites of MySpace and Facebook, can support participation and collaboration is rather underestimated in planning and design literature and practice. As we are witnessing increased use of social media in society – and the impact of social media on society – their use as a means to enable citizen participation and collaboration needs to be explored. In this paper, we analyse the role of social media in the Eo Wijers regional design competition in the Netherlands, which provides examples of the use of social media from the perspective of integrated design/ planning teams. We studied A) which social media the teams proposed and applied in the competition entries and B) the level of interaction with the public that the teams aimed for. By analysing competition entries, we aim to give insight in the knowledge and attitude of the professional designers and planners concerning the use of social media in interaction with the public, and the possible value of social media as a tool for collaborative creation in landscape planning and design.