Cool; an application that uses rules you give it to generate weird and three-dimensional graphics. (Via Sterling, who else.) This comes to mind, though; what if it could generate STL computer-aided design files? They are the kind that the RepRap's host software eats, I think. And making them in hardware, you have to admit, is just that crucial bit cooler.
Especially when the RepRap ends up surrounding itself in increasingly tiny interlocking cubes, like that spider in the J.G. Ballard story whose web is made of brain tissue, and which eventually goes mad and strangles itself. Hey, you'd get an Arts Council grant for the film, if not the installation. A tad messy even for an art establishment that loved Tracey Emin.