Here are some notes:
- It's been a while since I saw Sahara, but it reminded me of the solar plant in that movie.
- tower in center is 1 km high... more than twice as tall as the Petronas Towers in Kuala Lumpar, and visible from 80 kilometres away. (wiki says it may now be shorter)
- the surrounding base of about 3.5 km diameter doubles as a greenhouse
If you have high-speed internet: http://www.enviromission.com.au/project/video/video.htm
and of course google turns up lots of articles/news pieces as well.