MapQuest for Masters of the Universe

The internet toy for today is notably useful.  Map of the Market provides a visual representation of the stock market.  Instructions for use are here, but really, it's pretty self-explanatory.  And seems remarkably useful, at least insofar as it makes it easier to get your head around the market as a whole...  Apparently, Bedersen and Shneiderman of the University of Maryland developed the map.  Link via we-make-money-not-art.