Indeed fascinating articles. It is true that IT is very often overlooked as polluting industry, but the actors become increasingly conscious as time goes by. Even in boutique companies like mine, they have people thinking over this issue.
I don't think that they are suitable for running a data center. Mission critical Web site hosting, and power up Solar/solar and wind to which they are dependent on wind energy cannot help.
Thanks for sharing. And, yes its absolutely true that green hosting is getting very popular these days not only because it is affordable, but it is good for our environment as well as for conserving energy.