From the pictures, it looks like the prototype was printed on a Makerbot, which isn’t terribly high resolution as 3D printing goes. Hopefully the files can be printed as-is by Quickparts, Shapeworks, or Ponoko and still fit correctly. I double check the measurements, particularly for the eye pieces, before I sent this out. Regardless, this is a great idea.
By the way, there’s also this similar device. It’s not as elegant as the above iphone case, but it a bit more flexible and should work with an array of different eye piece sizes.
Perhaps the best-looking one right now is the SkyLight, which was funded via Kickstarter in January. It looks thoughtfully engineered, and can accomodate and array of eye piece sizes and many different smartphones.