Recent advances in wireless network technologies create the potential to significantly enhance the experience of a visit to a museum. On the exhibit floor, visitors carrying wirelessly connected portable devices can be given opportunities for exploration, sharing, explanations, context, background, analytical tools, and suggestions for related experiences. When these devices are part of a Web-based network, they can help extend the museum visit: in advance, through activities that orient visitors, and afterward, through opportunities to reflect and explore related ideas. The Electronic Guidebook project is a study of users equipped with such technologies, conducted by the Exploratorium in partnership with researchers at Hewlett-Packard Labs. The project has investigated how a Web-based computing infrastructure can provide museum visitors with an augmented museum experience, so that they can better plan their visit, get the most out of it while they are in the museum, and be able to refer back to their visit once they have returned to their home or classroom. The goal is to understand what technological infrastructure supports this extended museum experience, and to obtain preliminary data on how different aspects of the technologies, and the content delivered through them, affects engagement with the exhibits and pre- or post-visit learning activities. The project deployed and tested a network using a variety of handheld computers and radio-frequency identification tags to link visitors with exhibit-related content delivered by a Web-based server. Users in the study were able to access Web-based content, including text, images, video, and audio, during a visit. In addition, they were able to construct a record of their visit by bookmarking exhibit content, creating images, notations, and other artifacts and to access it on a personal Web page in the museum or following their visit. In this paper, presenters will provide results of the study and discuss promising avenues of future research on Web-based networks.