The Pocketbone project by the same guy is also worth checking out. It's a small Beaglebone based on the Octavo 3358, which is a huge SoC that integrates all of the hard parts of a minimal Beaglebone-like system. That project (also in KiCAD) can serve as a jumping off point for any embedded project where you need a tiny Linux system with hard real time performance and easy integration with high speed peripherals (thanks to the weird and wonderful PRUs in the AM3358 Sitara processor). These sorts of projects are really valuable in the embedded world because they demo a minimal implementation and in doing so reduce the magic that bogs down newcomers who just want to do something cool.