Today a man named Steve Mills launched an indiegogo project for new types of 3D printer filament. They include graphene and graphite conductive filaments as well as 'liquid plastics' filament. The liquid plastics is the most incredible in that it can be extruded without heat and from nozzles the size of a hyperdermic needle. If he succeeds, this could really help increase the resolutions of 3D printed objects on FDM printers. Read more about this incredible technology at http://3dprint.com/6568/liquid-plastic-filament