Should we be worried about the price of tortillas

Ok , it has started happening . BBC reported that in Mexico the Mexicans stage tortilla protest

The price of the flat corn bread, the main source of calories for many poor Mexicans, recently rose by over 400%.

President Felipe Calderon has said the government will clamp down on hoarding and speculation to ease the problem.

But some blame the rise on demand for corn to make environmentally-friendly biofuels in the United States.

So is this where we are headed , the developed nations divert food crops to the production of bio-fuels and in the developing nations there is shortage of food ?
If this story is indicative of what is un store we are headed for worse times than 'tortilla protests' To reiterate what I has been said before about the damage bio-fuels can wreak read George Monbiot's Worse than fossil fuel .
Bio-fuels are no silver bullet , the one all inclusive means to salvation . It has to be a number of ideas leading to the same goal . Also we just cannot fool ourselves into believing we can continue to expend energy at the same levels as we did at our arrogant best if we switch to 'sustainable alternatives ' .