UPDATE: Check out my drawing robot blog for the software to run this robot! http://www.plotterbot.com
Github link to Arduino code for TinyCNC: http://shor.tw/110
Step by step instructions for v0.29 here: http://shor.tw/10d
This is a small DIY 3-axis CNC. It basically consists of 8 plastic parts (1 part is duplicated, so only 7 unique parts), three micro servos. You will also need 1 zip tie, 1 rubberband, and a pen of your choice.
Join my drawing robot newsletter http://shor.tw/x6 or check out my blog http://PlotterBot.com for more information, build instructions, updates, and improvements.
I've uploaded an 8th STL file with all the parts arranged for printing at once on a Replicator 1. ;)