I just posted this in Cats General, Royal Canin recall thread. It's from the VetPet Digest:

"I've looked on the various international commodity trading sites and it is
very clear that the price of wheat, rice and corn protein is directly
related to the protein content. Further, it appears that this is the only
thing that differentiates 'feed' from 'human' grade. In the case of wheat
gluten, supplies advertised as 'human' grade had a protein content of 80% or
higher while 'feed' grade offers or requests were all below 80%.

There is absolutely no doubt in my mind that these products have been spiked
with melamine to increase the nitrogen and hence protein content.

Having spent 30 years working with various non-Japanese Asian suppliers in
the electronics industry, I think it highly likely that these same suppliers
will find something else to spike their products with once they know that
they will be tested for melamine. They will dump their existing supplies in
places like Thailand and Brazil or anywhere else where they can be
reasonably sure they won't be tested.

There is basically nothing the U.S. buyers or government can do about this.
Test for melamine, they'll use something else.

If we ban a company, it will simply close down and reappear minutes later
under a new name.

Or, they will set up a front company in some place like Pakistan to sell the
product, although it will still be shipped from China complete with
documentation showing it originated in Pakistan.

There is a report today that the Chinese government won't provide visas for
FDA inspectors to visit these suppliers."