BoardX is a collection of electronic circuit boards from Upgrade Industries that stack on top of one another to share resources, communicate, and extend the functionality of one another. This system is built on the motherboard that acts as both an electrical and structural foundation.
Unlike similar products (but much like a familiar PC system), the motherboard does not come with a processor pre-installed. Processors come as simple, low cost add-on boards, which allow any processor (or multiple processors) to be used with the system. BoardX is also Arduino compatible (with the Arduino SDK. shields, on the other hand will need modification)
Add-ons can be attached to the USB, SPI, UART, and I2C buses to provide any feature imaginable. These can be sensors, communication interfaces, or even physical control devices like motors or servos. With this idea in mind, a robust and flexible design can be achieved that allows you to choose which parts of the system to design and which parts can be off the shelf.
BoardX is available early and at a discount for contributors to the Kickstarter funding pool - http://www.kickstarter.com/projects/upgradeindustries/boardx-the-open-source-miniature-motherboard