Looked into those big wind power masts when I was in Hawaii, a 'windy' place. They contribute to the grid, but to provide the power needed for the islands would destroy many scenic places. Hard on birds. Public approval? Very doubtful.
But see the article on Hawai'i's wind energy. Much information there, and mention of some research in the mainland.
http://www.state.hi.us/dbedy/ert/wwg/windy.html

Some big solar collectors in Arizona. Individual collectors on houses is expensive. No one has figured out how to generate the total power needed for a city in an affordable way. Some interesting information on Arizona solar power-
Arizona solar center

Hydrogen offers help for transportation, but it will be years before the production capacity is widespread. Toyota starts production of an automobile next year, but its use will be limited to a few cities. BMW has been testing cars and buses for some time now, but similarly restricted. Time is needed to set up a network of hydrogen generation systems.

Italy looks ready to build new nuclear power generators starting next year.

The guy who figures out how to treat and use nuclear waste will become a billionaire.

Also the guy who can fit coal-fired generators with an economically viable device to collect the gases and make use of them. This would be an extremely important development. Even a couple of oil majors have done some research on this, but what works in the lab often isn't practical when dealing with the real thing.