Academic discussion of social challenges and the government interventions which might address them are overlooking social innovation as an option. Contemporary trends at the community-public management interface, however, show an upsurge of interest in social innovation as a way of simultaneously creating social benefit and economic opportunity. While this indicates that the idea has genuine substance our observation of international and Australian developments convinces us that there is now sufficient experience upon which to base an understanding of what social innovation is and why it has policy significance. In this article we identify some components of social innovation practice and indicate how these might be theorised into generally applicable models.