Triply-linked cubes

Triply-linked cubes

This one is simple, yet so elegant.  There are three standard open cubes, and they're all linked together.  I got this idea from someone offline, and I thought it must be a classic modular origami design, but I can't find anything like it on the web.

The windows on each face of each cube are exactly half the length of the cube's total face.  Therefore, each cube has room to link with two other cubes, making for a three-cube maximum.  In the link above, there's a picture of fourteen linked cubes, but the fourteen cubes are linked in a chain fashion.  In this triply-linked design, each pair of cubes is linked, including white to black.

ETA: I have since found some examples of this model on the internet.  Here's one on Flickr.