Visualizious is a research project about social indexing (a.k.a. social tagging), information retrieval and visualization. The prototype allows a top-level and detail view of the semantic relationships intrinsic in the folksonomy. Pathfinder Network Scaling, clustering and interactive techniques have been used for this purpose. This approach provides a means of knowledge acquisition and understanding of the socially constructed meaning of tags, as well as a means of visual information retrieval.The images shown here provide a visualization of the del.icio.us tags in an interactive graph using the Visualizious prototype.