This report summarizes the lessons learned from four pilot projects on transnational cluster cooperation within the Baltic Sea Region. Cluster initiatives have started to identify joint agendas and actions within the areas of ICT, Wood/Furniture, Food and Bio energy. In total 21 cluster initiatives participated. The pilot projects were initiated within the BSR InnoNet (the Baltic Sea Region Innovation Network) and the pilots were running between X 2008 and October 2009. The aims with these pilot projects were to learn more about how to create links between clusters in the region and to identify early results. During this period representatives from cluster initiatives have met, learned about competencies and actors in the different clusters and worked on identifying joint future actions.