The site for TAPoR at the University of Alberta has an interesting feature – a dynamic site map. In the lower left of every page (if your browser supports it) is a graph of the page you are looking at with the connections to other pages in the site. This worked for me in Safari, but not IE on the Mac. StÈfan Sinclair showed it to me as just one application of visualization. Now… can we turn it into a TAPoRware tool?