Hay all,
Thought I would share on here my RetroPie case. It has 2 ports for SNES connectors and a button on the front via the GPIO adaptor. Video and audio is via 3 RCA connectors at the back of the machine. Power and SD cards on the underside and USB on the top.
Files at Thingiverse: http://www.thingiverse.com/thing:180691
(PS its a long print, the shell took 11 hours on my printer with a further 2 hours for the base!)