Brandon Fosdick: From Rocket Science to Developing an Affordable SLS 3D Printer - 3DPrint.com | The Voice of 3D Printing / Additive Manufacturing
DIY 3D Printing: Sintratec desktop laser sintering 3d printer coming soon at affordable price (Update: they presented a good machine and had great Indiegogo!)
Engineer Builds his Own SLS 3D Printer - 3D Printing Industry
DIY 3D Printing: Open SLS: An Open Source Selective Laser Sintering Project
OpenSLS - RepRap
DIY SLS 3D Printer Getting Ready To Print | Hackaday