David in Brisbane has designed and published the files required to print a great case for our Freetronics EtherTen with an "Up" 3D Printer. The case was designed using Autodesk Inventor 2013 software, and you can download the design files from Thingiverse here.
A great case for a great board - the Freetronics EtherTen. Apart from being fully Arduino Uno-compatible, it has onboard Ethernet, microSD socket, full USB interface (so you don't need a costly FTDI cable just to upload a sketch!) and supports optional Power-over-Ethernet: