Joe Bonometti, gave a Google Tech talk on liquid fluoride thorium reactors. 11MB of powerpoint slides
Besides the low amount of waste and almost complete burning of all Uranium and Plutonium, another big advantage of liquid fluoride reactors is fast and safe shutoff and restart capability. This fast stop and restart allows for load following electricity generation. This means a different electric utility niche can be addressed other than just baseload power for nuclear power. Currently natural gas is the primary load following power source. Wind and solar are intermittent in that they generate power at unreliable times. LFTR would be reliable on demand power.
Small, mobile and factory mass producible liquid fluoride thorium reactors (LFTR) designs are being proposed. About 500 tons for the LFTR power plant to generate 100 MWe with 30 years between refueling.