I was playing about with grids and cubes and tested a grid cube. After uploading, it has proven to be popular. I'm going to work on a series of shapes to test my modelling and Shapeways printing limits.
Yes it's a simple shape but popular, it is very cool in the way it pushes 3D printing to it's limit, I'm surprised how the density doesn't cause problems.
It's turned out to be a great experiment and I'm creating more shapes here's a sphere.