QUOTE(dmhweb @ Aug 1 2007, 11:34 AM)

This stuff (polonium) is so rare and so toxic (it's 250 Billion times more toxic than cyanide) handling it is almost impossible and it can only be made by states with large nuclear programs. It also leaves a fairly obvious breadcrumb trail.
Actually, you can still buy the stuff over the internet. It is useful in cloud chambers, calibrating equipment, etc.
Polonium is an alpha emitter, so you are only screwed if you inhale or ingest it. Touching it won't hurt you.
It is naturally occuring in Uranium ore and tobacco smoke, among other places. About 500 times rarer than radium. It is useful in large quntities for building a neutron source - the only reason to have large quantities of it is for a nuclear program.
The fact that so much of it was used to poison someone is kind of shocking. That much of it isn't cheap, to poison someone in such a way makes a political statement more than anything else. It would be like burning someone at the stake using $20,000,000 in hundred dollar bills as the fuel.