There is an excellent piece in The Times about a Dutch project to supply hydroelectric power generated at an artificial island of their country's coast to support power supply when winds drop, the single biggest problem confronting wind power generation. The Dutch government is investing Euro 3.5 billion in the project and is confident that it would be profitable. Very interesting idea though I am not sure if it could be applied in places which are not as technologically advanced as the Netherlands. I will be watching this development. The article link is: http://www.timesonline.co.uk/tol/news/environment/article5119585.ece
The Dutch company behind this project is: http://www.kema.com/
All power to them!