The Residential Energy Consumption Survey, conducted by the Department of Energy, provides national and regional information about U.S. households and their energy usage. Data tables from the 1997 survey are now available online and provide fascinating details about how households consume energy. Interested in how many households have central airconditioning - and how often they turn it on in the summer? Or maybe you'd like to know how many hot showers people take in a week? The answers are here, and can be cross-tabbed by variables such as climate zone, census region, structure type, and household income. There's also data on home office equipment, computer usage, and factoids such as the number of hours spent per week online. Navigation is straightforward, although you'll probably spend a fair amount of time trying to find exactly what you're looking for. There's also access to the results of past surveys for historical comparisons.