The Million Solar Roofs Initiative — Million Solar Roofs (MSRI) is an initiative to install solar energy systems on one million U.S. buildings by 2010. Site includes links to financial incentives, outreach tools and more.
How Solar Cells Work — informational page from How Stuff Works. Easy-to-follow explanation of the technology and its applications.
National Renewable Energy Laboratory — “The U.S. Department of Energy’s premier laboratory for renewable energy research and development and a lead lab for energy efficiency R&D.”