The eagle design files and supporting documents for the Hackerling Circuit
Be sure to look at the wiki https://github.com/CuriosityHacked/hackerling-circuit/wiki to see the intstructions and more info.
Curiosity Hacked sells full hackerling circuit kits! info@curiosityhacked.org for info. $45 for all the parts and the board prepopulated with SMD accelerometer components.