Light transmitting concrete

I was browsing around some sites and found this interesting use of concrete. The concrete has optical fibers running through it so it can transmit light, while still creating a structure. I think this is fascinating and has the potential for many uses in creating artistic projects. I found a little tutorial where someone made a small scale version and it seems like it wouldn't be too difficult to make it if you can get a hold of optical fibers. I already found some places where you can get it relatively inexpensively. Because of the nature of the optical fiber, you could transmit various colors of light through the concrete in different areas, or obstruct areas as can be seen in the pictures below. Anyway, here is a link to an article about it.
http://www.impactlab.com/2009/03/07/litracon-see-through-light-transmitting/