This skyscraper looks to be quite awesome and is certainly worthy of note and something to keep an eye on. This will be the first 'net-zero energy' tower in the world. It will embrace wind power, solar power, possibly geothermal power it will be a mini-city with 20,000 inhabitants. I am quite attracted by these new projects and it will be good to see how it turns out in reality.
See the SOM website