Monetizing Graphical Search: "Vivisimo, a software company based in Pittsburgh, Pa., offers technology that clusters search results on the fly into folders labeled by category. While the typical list of search results appears on the right, the clickable folders on the left, helping the searcher make sense of the various links and drill down into more relevant results. People who love lists and are used to organizing information hierarchically may appreciate the way Vivisimo displays the folder contents as you click on the folders. "