'Library groupware' - a set of networked tools supporting information management for individuals and for distributed groups - is a new class of service we may choose to provide in our libraries. In its simplest form, library groupware would help people manage information as they move through the diversity of online resources and online communities that make up today's information landscape. Complex implementations might integrate equally well with enterprise-wide systems such as courseware and portals on a university campus, and desktop file storage on private individual computers. Ideally, successful library groupware should provide individuals and groups with a common set of information functions they may apply to any information they find anywhere. In this article we make a simple case for library groupware as a unifying service model across disparate information environments. We consider the distributed, personalised collection development model that groupware would serve, and propose an architectural model which might provide a first step in an evolutionary path from today's commonplace digital library services towards integrated library groupware.