One of the initial projects of the Commons is the development of Reference Extract. Reference Extract is an experimental web search engine built on the reference work of librarians. Librarians have long been seen as arbiters of quality and credibility. These librarians are now answering the questions of their users online through digital reference services. Reference Extract shall mine these questions and answers to create a new type of search engine. This search engine builds on the expert judgments of librarians in a modern, easy to use interface. Imagine searching the bookmarks of thousands of librarians and scientists. You can now try the prototype in its early stages of development.