Creativity researchers have drawn on cognitive principles to characterize individual innovation. However, few comprehensive frameworks have been developed to relate social innovation to social cognition research. This article introduces the Communities of Innovation (COI) framework and examines its applications in a culture designed to promote collaborative creativity. Findings included evidence for some aspects of the COI model (flow and hacker ethic, entrepreneurship, collaboration and mentoring, sense of community, and learning through design criticism), moderate support for others (dynamic expertise and idea prototyping), but no evidence for other components (developing adaptable knowledge and expertise, symmetrical expertise within the community, community reflection, shifting interpersonal roles, or benefiting from cultural/educational/skill/other diversity). The majority of the new ideas identified and shared by participants were developed through interaction with others. Implications for refinement of the COI framework and future research are discussed.