As 3D printing seems to be the fashion here at the moment:
We've been doing a (tiy tiny tiny) bit of client work in the 3D printing area. One area of application that I thought was interesting was that NASA have been looking into 3D printing using electron beams to melt metallic wire and reform that as 3D objects.
In itself this is pretty interesting as it mean that 3d printing of metal parts would get around the issues raised in the other 2 threads.
More interesting still though is that they have been testing this in the "vomit comet" - meaning that they have zero G 3D printing in their sites. If you are thinking about 3D printing as a means to avoid distribution costs then the ISS has to be the ultimate market for that.
Almost as cool as "burritobot" http://burritob0t.com/ ("Burritob0t is a 3D printer that prepares edible burritos within minutes")
Looks like they had a real life application to use that 3D printer in the space station:
http://www.wired.co.uk/news/archive/2014-12/19/3d-printed-space-wrench