Vermont-based NRG Systems, which is a big player in the windmill industry, was growing rapidly and needed a new building. They decided to 'walk the walk' and ended up creating an unbelievably environmentally friendly commercial building. They are in Hinesburg, VT, near where I live. They have a whole section of their website dedicated to sharing info about this building which is really fascinating.

http://www.AcehAid.org