This is an enclosure for a Chumby Hacker Board designed for 3D printing. It has openings for power, USBx3, audio/video and serial-console connections. The top and bottom of the enclosure are open.

Print it, press the Chumby Hacker Board into place. It snaps in snugly, no screws required.
A lid can be added if desired. The bottom is left open to (a) save material (b) make it possible to press the board back out of the enclosure, and (c) to provide access to the SD card.