Usually, you sign up for an invite at some website, and you don’t hear from them for a while. That is, until they launch. By then, you’d forgotten all about why you were interested in the first place.I’m going to try something a little different. …

In the last couple of years, the cost of 3D printing has been dropping dramatically to the point where home and desktop 3D printer kits were available. In 2009, there was one major home 3D printer maker, called Makerbot. In 2011, we’ve counted at …