::I'm unsure if this article is legitimate. As a concept, 3D printing sounds interesting and brings to my mind images put together via lasers inside of chunks of plastic. There appears to be a lack of concensus on what 3d printing actually is. 
 ::Also, rapid prototyping is mentioned several times here, which leads me to believe that article should be looked at. The two ideas seem conceptually similar enough and from reading previous comments it sounds like the machinery is similar enough. This could be a case of two names for the same idea.