If they have no orders for turbine blades, they have no need to build them at the moment. Perhaps when the credit crunch eases and the economy picks up, more customers will be ordering blades. Until then I suppose there is no need to keep the plant open - and it really does not matter if the product is turbine blades, guitar strings, or buggywhips.
For the future wind power has great promise. Problem is, that does not give the workers anything to build next week.