232TH is not fissile in itself however it is commonly used as a fertile material to make 233U, which can serve as a nice fuel for a power reactor (breeder reactor).
Here is a linky if people want to read a little more about TH reactors
http://www.thorium.tv/en/thorium_fuel/thorium_fuel.php
Bottom line: This technology is well worth investigating and when the obstacles are overcome it may become viable.
One of the disadvantages is that it opens up another window for proliferation.