I ordered another print from Shapeways and after some volcano-related delays, it finally arrived. Another good experience from Shapeways. Now that Sketchup 7.1 can do Collada exports, the process is easier but still, it does not have power tools for mesh editing, so it sometimes can be difficult creating a watertight model that passes Shapeways' checks. Each 2-part case was a bit over $3 in "White, Strong and Flexible" material. (They're small) and shipping for orders over $25 is free.