The problem with wind power is that the wind may not be blowing when and where you want it (with solar power, at least the sun is likely to be shining on hot, sunny afternoons when air conditioners create a peak load problem).
What is needed is a storage device that doesn't lose too much in efficiency as it stores and returns power. Last week we noted the idea of highly efficient catalyzed eloctrolysis - electrictiy is stored chemically by creating hydrogen gas from water.
Here are two more idea - mechanical storage using flywheels and compressed air storage. An obvious cousin to the compressed air model is to use a windmill as a water pump - pump water uphill when the wind is blowing and run the water downhill through a turbine as power is needed. I'm probably too late to patent that (that is a different Tom posing the questions there, and the calculations of relevant scale are deflating). And just off-hand, the areas in which T. Boone Pickens is planning his wind farms don't strike me as having easy access to lakes and dams.