Over the next two weeks the Department of Energy's Solar Decathlon takes place in Irvine, California. Members of the media got a sneak-peek walkthrough yesterday at how 19 teams have translated their visions for energy efficiency, solar energy, and a laundry list of sustainable living features. (The event's location, the Orange County Great Park, is itself a model of reuse and sustainability, formerly home to the El Toro Marine base.)