The Nintendo Wii is an extremely efficient gaming console. Check out this graph from an article over at Hardcoreware.net:

Nintendo Wii Energy Consumption vs. Xbox 360 and Playstation 3

It's Bruce Lee in a market full of Mike Tysons. Consumer green fever is off the charts. Companies are scrambling to position their products with Energy Star and USDA Organic labels. The US gov't has a presidentially-appointed energy vampire slayer. (No I'm not kidding) So, why isn't Nintendo shouting this from the hilltops?