The reprap machine sprays plastics in layers untill they solidify and then sprays more layers, thus creating 3D plastic objects. It can even replicate itself! The machine is completely open source and you can build it yourself for around EUR. 450,- and some time. You can find the instructions here
Apparently the entry requirements for the US will require an electronic registration with the US government at least 3 days before travel. El Reg is there. http://www.theregister.co.uk/2008/06/03/us_visa_scheme/. Keep in mind this is on top of the anal probe, DNA swipe, taking of fingerprints, retinal scan, drug use inquiry and all the other fun stuff potentially Read more about US to EU : y’allz a bunch terrurhists, y’hear?[…]