This paper examines the impact of exciting new approaches to open data sharing, collaborative web tools and social media on the sustainability of archaeological data. The archiving, reuse and re-analysis of data is often considered intrinsic to archaeological practice, not least because of the destructive nature of excavation. The idea that the pace of adoption of new digital technologies can outstrip the development of the infrastructure required for sustainable access to its outputs, ultimately leading to the loss of data, is sometimes referred to as the ‘Digital Dark Age’ problem. While strenuous efforts have been made to address this issue, the recent rapid uptake of a new wave of tools to enhance access, promote wider dialogue and gather data has the potential to recreate this problem. This is particularly true because of the volatile technical, legal and commercial contexts in which much of this work takes place. This paper explores these problems, discusses potential changes in the nature of archaeological dialogue and information sharing, and posits solutions that might mitigate a second ‘Digital Dark Age’.