I REALLY like electric light power by way of "Saftey" Pin. I have a set of lights like these from Ikea, and the real thing isn't all that different. Pointy metal piece breaks the insulation on the power wire. I've wondered about the saftey of them myself.

On Demand Gas Hot water heater is no longer an "Oddity". GE offers one http://www.geappliances.com/products/introductions/tankless_gas_water_heater/
here in the states.

(Full Disclosure: Chicken Brian is an employee of GE)