The document discusses ways that library catalogues (OPACs) can adopt more modern, user-centered features inspired by Web 2.0 technologies. It describes the University of Huddersfield's experiences enhancing its OPAC with spell checking, keyword suggestions, ratings and comments, and integrating data from outside sources. It advocates an experimental approach to prototyping new features, and highlights examples of OPACs adopting open source platforms or using third party APIs. The document argues that while cosmetic changes may not be enough, libraries should explore new ways of engaging users and exposing collections through their OPACs.