Quick points.
Sequestration is a dead horse. We have put so much CO2 into the oceans (they absorb it from the atmosphere), that they will outgas more than enough if sequestration were even to stabilise emissions. And we emit something like 7Gigatonnes p.a.
http://cdiac.ornl.gov/trends/emis/glo.htm so unless we can make it profitable, ploughing money into it is wasting resources best spent elsewhere.
Chernobyl: The same accident had been narrowly averted previously but due to obsessive soviet secrecy Chernobyl's engineers were not warned!
The major problem I have with nuclear is that at present it's expensive compared to fossil fuels so in a free market like the UKs de-regulated market investment in nuclear stalled.
As gas and oil costs increase post Hubbert's peak the likelihood seems to be that we'll move onto coal.
Nuclear needs to be driven and assisted by government. Perhaps Government funding waste handling would be enough? Is there an energy economist in the house?

Do we just have to dump waste? Can't we extract power from it? As Lovelock says, he'd happily have a mass of waste - he reckons he'd generate his domestic power from it!
Anyone know why Mixed Oxide generation using Pu as fuel isn't widely used?
China's and India's growth is currently fuelling stock market growth to a significant degree. Whatever we do in respect of both those countries is likely to be both politically and economcally difficult. How do you tell China to do anything anyway?
I agree that we can't stop emissions growth and this means I don't think we can stop significantly more warming.
However the idea of 'wedges' that Al Gore promotes in an Inconvenient Truth is IMHO our best bet. See the graphic here
http://www.terrapass.com/terrablog/posts/2006/06/co2-wedges-superheroes.html (I have not fully read the blog - and don't think emissions stabilisation is a realisitic option) But the graphic shows the point.
For every bit of emissions we 'slice' off we reduce future build up. This might either:
1) Keep us further from any potentially dangerous results.
2) Give us more time to find new solutions, or to allow new technology to intercede. I can't source but in London in the 18th Century projections of the growth of horse manure waste were (would have been?) alarming, then came the internal combustion engine.
Foster national and regional pride in food and goods. Generate a shift in culture back to buying locally from local suppliers. Increased growing seasons and warming in the UK may already be positively impacting yield and diversity of crop in UK agriculture. I say may because this is second hand from a climate scientist - I'll try to track down refs if asked.