http://www.washington.edu/news/2012/10/25/students-win-100k-for-3-d-printer-... A University of Washington team this week claimed top prize in the first 3D4D Challenge, an international contest to use 3-D printing for social benefit in the developing world. The three undergraduates won $100,000 to form a company that will work with partners in Oaxaca, Mexico, to build machines that can transform waste plastic into composting toilets and pieces for rainwater harvesting systems........