Ladies and gentlemen, a glimpse into the future of personal manufacturing:
http://reprap.org/wiki/Main_Page
The RepRap at the moment can only create objects from a couple of materials, however it's only a matter of time before more materials are added (and a finer nozzle as well to create more detailed objects).
IMO the next logical step after the RepRap would be an assembly robot either as part of the RepRap or separate so it can automatically assemble the completed parts into more complex machines.
Of course these advancements are still a while away, so in the meantime lets hear your comments, speculation, etc
