Here are some "open source" 3d printers that you can build at home for under $1500: * RepRap - A project with the lofty goal of printing circuit boards and bec

Here are some "open source" 3d printers that you can build at home for under $1500: * RepRap - A project with the lofty goal of printing circuit boards and becoming self-replicable (http://reprap.org/wiki/Main_Page http://reprap.org/wiki/Main_Page) * Fab@Home - a 3d printer that tries to optimize print quality, but not necessarily print itself (http://www.fabathome.org/ http://www.fabathome.org/) * MakerBot - A company that makes several variants of the RepRap (http://makerbot.com/ http://makerbot.com/) There is a community site of 3d models to print at http://www.thingiverse.com/tag:reprap http://www.thingiverse.com/tag:reprap