Concentrated solar power isn't just for deserts, it could be for WALLS too!!!

http://green.yahoo.com/blog/ecogeek/1322/concentrated-solar-power-isn-t-just-for-deserts-it-could-be-for-walls-too.html;_ylt=ArfWUFLiM.zJS4.0uF10Rl2AV8cX