Great comment - thanks for the pointers. This is one technology that I did not look into quite as thoroughly as I should have and I agree it is very interesting. It has been built out in Spain as well as California. Of course, you need a storage function, otherwise there is a need for associated co-gen at night as with some of the earlier existing parabolic systems. Scale and transport are still problematic - and maybe we will get these under control. I certainly hope so, I want to run my AC my PC, my heater and my TV without hurting the planet if I can avoid it. And I am not by any means suggesting nuclear is all good; I am suggesting it is a hell of a lot better than we are led to believe by the coal and oil lobbies. Unfortunately "green" opponents of nuclear, by fighting the wrong battle, are just facilitating the continued use of coal fired plant, surely the worst of all from almost any perspective, instead of helping replace coal or oil with a cleaner (not zero impact) technology that can help us mitigate the effect of our power choices while we develop and mature solar, local micro hydro systems, and other technologies. My point - lets fight the right battle and get rid of the worse first. Nuclear can then be an ally and not an enemy. Plus, it is cheap - and solar isn't, yet. Still I am cheering it on for sure.