From the "World Socialist Web Site", I actually found the most thorough summary of the news concerning the Tuwaitha contamination. If you'd like a brief summary of what's been discovered thus far, this is a good article to read. They also editorialize a bit, but I have to say that I'm starting to agree with some of the sharper criticisms:

] Thus far, the Bush administration has stonewalled the IAEA,
] maintaining that it will "eventually" allow its inspectors back
] in, but that there is no immediate plan to grant them a role in
] Iraq. It is carrying out this exclusion despite the fact that
] the UN inspectors are the only ones who have a detailed knowledge
] of what was stored at the looted sites and therefore are able to
] confirm what has been taken. This seemingly irrational refusal to
] allow the inspectors to carry out this urgent task is bound up
] with Washington's determination to prevent any international
] interference in the US installation of its own hand-picked Iraqi
] puppet regime.
]
] The US media has paid scant attention to these "disturbing"
] reports [about Tuwaitha radioactive contamination]. It has
] focused instead on unsubstantiated claims by the Bush
] administration that US occupation troops have found a truck in
] northern Iraq that "could have been used" as a mobile
] biological weapons lab. The Pentagon admits that thus far it has
] found no trace of biological agents on the vehicle.
]
] The relative indifference to what may soon prove the worst
] nuclear disaster since the Chernobyl meltdown in 1986 underscores
] the predatory character of the US war and occupation.

Tuwaitha may be 'the worst nuclear disaster since the Chernobyl meltdown'