Sean and I just finished building a Raspberry Pi-based handheld emulator system, than can play any classic video games up through the SNES/Genesis era.  It came out pretty good, but it took three times to get case printed correctly.  The stock case STL files from Adafruit were just not big enough - I had to scale things up in height to get all the components to fit.  Eventually I'm hoping to mill (on the CNC machine) a replacement case from some exotic wood, and made some wooden buttons as well.  That would look pretty sweet.