I came across this project browsing sparkfun:
https://github.com/e-radionicacom
It has open source hardware and software code linked in github from various parts of thier forum:
http://forum.e-radionica.com/en/view...62ad520db8212b
This is certainly not going to be for everyone, but I thought some of the dev types would be interested in this.
https://github.com/e-radionicacom/In...Schematics.pdf