I was just chillin’ round the web, and then suddenly I found this site, A guy that built a robot that draws on walls and called it PlotterBot. In addition, this nice guy made a list of similar projects around the web. so anyone can join the efforts at the current step and proceed.
I specially liked the project named “Der Kritzler” by Alex Weber, implemented DrawBot with Arduino and processing Language (Maybe I’ll run it on my unemployed Arduino Duemilanove ??)