This is probably old news to some of you and, maybe it's already been on Gizmodo or something but, it's news to me. They are contemplating fabrication machines that can build entire concrete houses.
- Discover Magazine: The Whole House Machine (PDF file)
- The 3D printer that can build a house in 24 hours
- Researchers Are Making A 3D Printer That Can Build A House In 24 Hours (Has video)
It's not quite the architectural coral of Niven's Gift From Earth or growing houses from giant crystals of diamond but it's still pretty cool.