There's a neighborhood in Austin, Texas where the refrigerators tell stories. The roofs are paved in solar panels. There are more electric cars per capita here in the Muëller community than in any residential neighborhood in America. It's a kind of paradise and it could drive you nuts. It's also the future happening right now.  Even when she's out, Kathy Sokolic can tell when her husband gets home or leaves because the light switches leave a trail. In their house, every carbon footprint gets tracked as part of the Pecan Street Research Project. It's preparation for America's energy future. Seven hundred otherwise-normal homes have been wired to track how peopl