The "Architectural Practice in Post-War Queensland: Building and Interpreting an Oral History Archive" project is a collaboration between the University of Queensland, the State Library of Queensland and four of the longest-standing architectural firms in Queensland. The aim of the project is to build a comprehensive multimedia digital archive that documents architectural practice in post-World War II Queensland (1945-1975) - a period of architectural practice that was highly significant but has been largely undocumented. Currently, most of the knowledge of this period is in individuals' memories, in private hands, or highly dispersed across architectural firms and collecting institutions (e.g. State Library of Queensland, John Oxley Library and the University of Queensland Fryer Library). This paper describes an innovative approach (based on Semantic Web and Web 3.0 technologies) towards establishing a comprehensive online and evolving knowledge-base for research, teaching and practice within the disciplines of history, architecture and design which includes the development of analytical and search services. At the same time, the challenges faced by the project are enumerated: they include ensuring the archive's sustainability, resolving issues of identity and implementing quality control over community-generated content.