Just last week we covered SRS Energy's Solé Power Tiles, which disguise solar panels as clay roof tiles. Now a similarly unobtrusive solution for cloudier climes is on the horizon. RidgeBlade is a wind-power system that can be fitted to buildings with minimum visual impact and maximum energy conversion potential. This micro-generation system employs discreetly housed cylindrical turbines positioned horizontally along the apex of a sloping roof. The slope of the roof naturally channels wind into the turbine chamber, meaning RidgeBlade can