Cool bed idea.
Hugelkultur: The ultimate raised garden bed
basics of hugelkultur - using rotting wood as a base for a garden - water saving, humus-making
:: build a poultry "ark" : perfect for city chickens
layman's terms explanation I have found about solar water heating.
DIY Wind-Powered Water Pump Made from Bike Parts
Build your own $20 outdoor cob oven for great bread and pizza