Late last year, Shapeways tested a solid silver material and found it popular with their users. After the trial they did a bunch of research on the products, process and price, took all they learned and have now applied it to a new, permanent offering of silver.
And it looks amazing, so shiny! I like shiny!
Anyhow, they have posted some design rules so that your silver creations turn out their very best.
So fire up blender and start creating some shiny awesomeness.