Online 3d printing site....

[CroftonGraphics]

Hi there I found this company that will print small 3d models,
the examples on the site are gremlin things etc, but could be good for more abstracted componants for larger works -

http://www.shapeways.com

Seems like you can export standard 3d meshes for printing as well as their own 3d creator.

[Harryman]

That's a nice find. Prices seem pretty reasonable for the materials and resolution.