pietja built a free Bus Pirate v4 PCB. There should be a few dozen of these out there. If you have the Bus Pirate v4 please help us develop and test the new firmware.
If you build a free PCB we’ll send you another one! Blog about it, post a picture on Flicker, whatever – we’ll send you a coupon code for the free PCB drawer.
Get your own handy Bus Pirate for $30, including world-wide shipping. Also available from our friendly distributors.
Another one: http://kennethfinnegan.blogspot.com/2011/09/mma7455-free-pcb-build.html
kudos to pietja for using an OTG connector!