In yet another sign that 3D printing is becoming more and more mainstream, Amazon.com has opened up a dedicated 3d printer store. They stock things such as raw filament, CAD software and the replicating devices themselves. Just eighteen months ago, we considered it news that a unit built for home use was available for just $2,000. Now there are a couple dozen different consumer grade printers in stock, and some of the cheaper ones are approaching $1,000. Still, until the prices come down a little more, I'll be picking up my models at Shapeways and shopping Zombie Apocalypse Supplies when I'm at Amazon!