This is the winner of the Global Green Competition called GreeNOLA. The project is designed to reduce operating energy by 50-60% compared to traditional homes by utilizing energy efficient appliances, solar power and recycled material. View the other projects in the competition here.
The 505 House by Collaborative Designworks, Houston, TX is interesting to me on several levels. Not only does it utilize sustainable principles, it was developed to compete within a speculative housing market.