Looks like those concept building shingles that double as solar-electric cells are getting a real-life counterpart in SRS Energy's solar roof tiles. Designed to look like "normal" roof tiles, they come in active and inactive tile versions, incorporating special connectors so wiring-up is simple.

You can attach them in the usual way with a nail gun, and then feel all eco-goody-goody about yourself as they generate power for you. Sometimes the pace of technology is amazing, and often that's bad for the environment: not in this case. Hopefully available soon, at an estimated price of around $17,500 for a 3kW system. [SRSEnergy via Treehugger]