This is a brilliant idea: the evolution of solar power. I read this and thought, duh, of course! there's more heat than light and the science behind it makes more sense as to why this is the better way to go. I'm sure there are alternate thoughts on this point, and I'll keep an eye out for those as well.
New York Times' article called "In the Desert, Harnessing the Power of the Sun by Capturing Heat Instead of Light" printed 17 July 2007 by Matthew L. Wald