Arduino Holder Plate - Tidy Breadboarding Awaits!
We started with Oomlout's Arduino holder and took inspiration from Adafruit's improvements.
The result is a roomy prototyping plate where you can orient the Arduino either way.
If you don't have your own laser cutter we have plates available here: http://www.phenoptix.com/products/arduino-prototyping-board-acrylic-plate-and-mounting-hardware