Have been reading some disturbing stories about birth defects in Iraq as a result of DU weapons and understand there being used in Afghanistan.
Search 'DU birth defects' images if you can bare it, about as grim as you can get. There's 1000s of tons of it with little use.
Other than ammunition, where it does 2 things;
1 > With unparalleled density it will blow a hole in almost anything.
2 > Is vaporised to Uranium Oxide, a soluble, airborne radioactive poison.
Like a new agent orange.
It would be simple to say ban it, but point 1 is why I guess this isn't the case.
However I think it should be classed as a chemical weapon, or at least one of last resort. currently its not.