This board was designed in February some time:

The board was sent out for fabrication using Advanced Circuit’s Barebones service:

(Yeah, it’s actually about 1″ square)

In this board, I used the Sparkfun EAGLE library, my own library, and created three new parts (the IMU and ESC pinouts/outlines) and a surface mount 3×2 header that I ended up not including in the board.