cool project Markus !!!
i really like that "translator" pic !
we all have also all those left over human input devices sitting in the dust who were kill by multiple uncompatible Windoze updates !
i also have the same question, i saw on your projects great perfboards, are those from seeedstudio ?
are the solder ring hole things pass throught both side of the board ? http://www.seeedstudio.com/depot/protoboard-6cm-8cm-20mm-p-715.html?cPath=175_188
i only get really crappy perfboards from my local source, their solder rings falls like leaves in Autumn !