It appears the rocket gods are teasing me about my unfulfilled obsession with SXSW. NewSpaceWatch notes that "DIYROCKETS and Sunglass Team up to Launch World’s First Collaborative 3D Printed Rocket Engine Design Competition"...which kicks off at SXSW. The 3-D printing company Shapeways is also involved.
This will be interesting to follow. I know of two ongoing DIY, printed rocket engine projects: Unreasonable Rocket and Rocket Moonlighting.