Visual Who is a tool for visualizing an electronic community. Using data such as mailing list subscriptions, it creates a spring-based model of the patterns of affiliation within the community. By varying the groups chosen as anchor points, the user can explore interactively the underlying social and organizational structures. The goal of Visual Who is to make the social patterns of an electronic community visible. A large-scale installation version of the project is being built in collaboration with the Responsive Environments group. There, the visualization is displayed on the LaserWall and music and sound accompany the motion of the anchors and names.