From the Adafruit forums…

Hi, Adafruit! I thought you’d want to hear about a robot built with your motor shield that made it’s first public appearance last night.

This is a wall-hanging, mural drawing robot. The code is [here]. And a set of assembly instructions is available [here].
It can draw pictures with commands sent from the the Arduino serial interface or it can be driven like an etch-a-sketch.
It understands g-code commands G0-G4,G90, and G91. (see: http://en.wikipedia.org/wiki/G-code)
Try uncommenting #VERBOSE in the Arduino code and see how busy that window gets

I did my best to document development on http://www.marginallyclever.com where I will continue to post as I make improvements.

I’d love to talk to you about a bulk deal because I want to package the parts and sell them as a kit.

Pictures from the Vancouver Mini Maker Faire Fundraiser last night: http://imgur.com/a/Z2F4e

Have a great day!