Electric Power Research Institute has estimated wave and tidal power could provide up to 10 gigawatts of power by 2025. http://www.greentechmedia.com/articles/ocean-power-meets-bike-chain-company-gets-14m-5970.html
Four more rounds of formal negotiations are scheduled before the Dec 7-18 talks in Copenhagen. These are June 1-12 in Bonn, Germany; Aug 10-14 in Bonn; Sept 28 to Oct 9 in Bangkok; and Nov 2-6, at a venue yet to be decided.
In addition, heads of state and government will gather in September at a U.N. climate change summit in New York and President Obama will host a major economies forum on the sidelines of the G8 in Italy in July. Two other meetings convened by the United States will take place, one probably 26-27 May in Paris and another in June.