Preprints promote the rapid and open sharing of research, typically prior to formal peer review. However, they also carry another benefit: they enable peer review to proceed in new and more productive ways. Open feedback and review of preprints can promote more rigorous and informative evaluation that involves broader participation from the scholarly community. In this session, we will explore different approaches to public feedback on preprints and a vision for a future in which they change the structure of scientific communication to promote collaboration at earlier stages in the research cycle.