I have started a project to build a 3-axis desktop CNC machine. It started with grbl on an Arduino UNO to drive a couple of CD-ROM drive stages. The goal was to create a business card sized laser cutter. Then I discovered the ShapeOko website and the project grew.
So far I have Grbl running on the Arduino with grblShield to drive the stepper motors. Laser cut profiles are back from the laser cutters and most of the hardware has arrived. Construction will start soon.