Trisetum distichophyllum: added this "A Very Open Xmas! - Part I: Hardware" article to MIT OCW World University and School - Hardware_Resource_Possibilities, Virtual_Worlds, Brain_Computer_Interface, Liking, in particular, here: Virtual Reality Headsets as DIY - and vis-a-vis WUaS

If you are on a tighter budget, you could go for the Open Source Virtual Reality Goggles that are currently running a crowdfunding campaign on Kickstarter. Inspired by Google cardboard, the DIY Virtual Reality Goggles extend functionality with, not only a magnetic button, but a capacitative switch that guarantees the goggles will work with virtually all smartphones with a touchscreen. It also includes a rig that allows you to attach the goggles to a cap, which means you can use it hands free… Because you’re going to need you hands for the Leap Motion you can mount at the front of your device, allowing you to interact with the VR world using your hands.

They have also created an Open Source VR development framework called GLAM, that allows developers create VR environments as easy as creating web pages, so it’s a gift to programmers too.