Hi RJT. Wind power is off and running in the US.
This website has alot of information. Solar power is also coming along, though these sources will probably never produce more than a small portion of the total electric demand. Sandia National Labs is working on a solar-powered stirling engine electric generator that I think is brilliant.
Here is a press release on it.
These technologies are coming along, but IMO alternative energy sources will only be deployed on a large scale when they become economically viable.