KiNG is a piece of software for viewing three-dimensional vector graphics. For a class project my sophomore year, I modified it to run on the video wall. KiNG is started on each of the wall nodes, then a master version of KiNG sends vector data and mouse events to all of the nodes, giving the illusion that the wall is being controlled by a central copy.
Screenshots are available at: http://www.jmu.edu/hyper/visualization/mouse-genome/index.html.