I saw this yesterday, and spent over an hour going through it. It's not just a one-off concept sketch. There are evidently about a dozen competeing firms and plans for a new WTC. This is a good first one to go public. http://www.wtc2002.com/start.lasso There's also a spot to vote "yes or no". I liked it. Wouldn't say it should absolutely be the way to go, but I like the way it's been thought out. I hope other proposals come public soon.