I dont see the oceans as being a practical source of energy. I am very happy to see what they did in australia and hope that is just a model for other places but wave energy does not seem like it would work to me. Maybe thats just because i really dont know anything about it but i think geothermal/ wind damed water and solar are our best bets. Wind power in my biased opinion is the best form, it gives tons of farmers another source of income just to let a comany come in a put up a single turbine in their field. The ONLY complaints about them is the people who are so stuck up on NIMBY (not in my back yard). River water also seems like a good idea but it can have its downsides- you alter an ecosystem greatly when damming an area and what happens if you have a severe drout? Solar power is the best for some parts of the world but here in new york its cloudy more than it is sunny so it wouldnt make much sence for that. In a place like arizona where they always complain about power problems i dont see why they dont just fill up empty desert with huge solar pannels instead of buring more fossil fules.
Any of the alternitives are way better than what we have goin on right now and im about to look into the ocean waves one