It is not flat...

Wave power is the transport of energy by ocean surface waves. The energy provided is most often used in desalination plants, power plants and water pumps.

The problem is that it's not easy to harness this energy and convert it into electricity in large amounts. Thus, wave power stations are rare.

But there are already countries which are beginning to invest in this type of energy.

Portugal could create an industrial cluster around the energy of sea waves which will create between 30 to 40 thousand jobs.

The Portuguese coast will have the first machine to generate energy from waves of sea worldwide. The world's first park use of wave energy was opened off the coast Póvoa de Varzim in northern Portugal. It is a great investment for our country.

Sources:

http://home.clara.net/darvill/altenerg/wave.htm
http://www.alternative-energy-news.info/technology/hydro/wave-power/
http://povoa2010.blogspot.com/2008/09/o-primeiro-parque-mundial-da-energia.html