Minecraft structure planner to OpenSCAD Ruby converter

I've been working on this Ruby script on and off for a while now, but never felt it was ready for distribution. Then http://minecraftprint.com/ came along, and made me push an early version out. While I see the benefit of being able to search through an entire world and pick out the structure to print, it's not really an option for larger worlds, and the selection method seemed cumbersome.

My idea is to use an established file format as the base for conversion - http://www.minecraftwiki.net/wiki/Schematic_File_Format The worldwide Minecraft communities create and read this format with an assortments of tools. At the server I play on, we use World Edit, with it you can select and save areas of the world to file very easy. To make it simpler to convert I send the schematic file through Minecraft structure planner which exports to xml.

At the moment the script is VERY crude. It runs through a Minecraft Structure Planner xml file and creates a OpenSCAD file where it places a cube();