Got this in the email this morning: a cursor-tracking Qui-gon Jin robot. This robot follows the cursor across four screens (yes, some folks are into that much geekery.) The user can immediately tell which screen the cursor is on. It really is something quite nifty to have. If you had four screens worth to work with
What was more interesting to me was how its creator, Russ Nelson, built the robot. Apparently, he used a microcontroller from MakingThings, and wrote his own driver which interfaced it to X.