A little while ago PENSA! wowed (a specific section of) the open source maker community with a few teasers for a brand new desktop rapid prototyping machine.
Their DIWire (DIY’er…get it?) takes aluminum wire and bends it into any shape specified in a wide variety of file formats. It’s a compelling idea and now that they’ve released all of the design files on Google Code and Thingiverse the community can start using and improving it.