I think we need a big return to nuclear.
I suspect that Japan will make the voices of the anti-nuclear mob louder, yet the recent saga of these aging reactors should be looked at as a marvel of engineering - remember they were hit with an earthquake 8 times stronger than their design, and no reactor damage, and all reactor safety systems worked perfectly. They were then hit with a bloody great wave, again not part of their design, which although this wiped out the diesel generators, the reactor safety systems survived, and the cooling was happily running on battery. It was from this point on it all started to go wrong, as they couldn't get mobile generators in place within the hours before the batteries run out - thats a procedural problem, compounded no doubt by the devastation in the area, and lack of that level of diasaster planning (which was 2 natural disasters way bigger than anyone could have imagined).
As I see it, the biggest issue with nuclear is with manmade attempts to damage the reactors.
We have to accept at some point that coal and gas will run low. Solar won't cut it, as demand is highest when the panels aren't working, wind and wave are too unpredictable, we are unsuited to traditional hydro-electric, and stored hydro-electric is only for short term peak demands (hours, and need masses of energy to repump the what back up).
So we should be adopting nuclear, initially to sit along side fossils, then gradually to replace them IMHO.