IT-support for knowledge work should be designed to support and enhance the human interaction and knowledge sharing processes. The specific usage of web-based technology gives the possibilities of putting crucial, knowledge-related interaction on-line. For example, sharing bookmarks among knowledge workers seems to be a necessary and useful activity. Important and valuable bookmarks often mirror what kind of information and knowledge people are looking for and also what kind of forum they use to go to on the world wide web. In this work we have developed a prototype, KNOWMAN, which manages bookmarks on the world wide web. The prototype is designed as a user-friendly "pad-interface" in which bookmarks can be collaboratively collected, shared and further annotated and explored by other knowledge workers.