I'm really not too worried about the cost of tortillas in Mexico. Maybe they should plant corn down there, it would give them something to do besides crossing the Rio Grande and sapping benefits on this side.
As for tilling arable land for ethanol, I have mixed feelings on that, too.
I watched for years as farmers let their fields up here grow fallow under the PIK program, getting paid by the government to NOT plant crops. It kept the price of a bushel of corn from falling too far, as well as other costs associated via ripple effect.
Now I understand the price of a bushel of corn here in Wisconsin is up over $3.00. That'll keep the banks from foreclosing on the remaining farms, and they can use their PIK acreage for something productive again.
Ethanol isn't THE solution. It never was, nor will it be. It will, however, make a goodly dent in that big sucking sound of U.S. dependency on foreign crude, assuming that the petroleum saved doesn't go into some fat-asses' Hummer H2 in Hollywood, or John Travolta's 707. All the fuel savings in the world doesn't help if your neighbor decides he's going to use even more. I got my electric bill down to about $125/month, but that pales in comparison to Al Gore's Inconvenient Truth of $1,400/month.
BTW, corn isn't the last word as the feedstock for ethanol production, either. Cellulosic ethanol, made from sawgrass, corn stalks, and even municipal waste, appears to have a 9x yield compared to the current corn distillation techniques. Expect the first cellulosic ethanol plants to start producing around 2009. Many of the current corn-fed ethanol plants here in Cheeseland were built to be able to convert to cellulosic ethanol extraction at a later date. The corn farmers may want to pay attention to that, and maximize the temporary higher profits from their crops for the time being.
NIMBY people are why some locations suffer with homeowner's associations these days. They're a relatively new invention, based on the premise that "I like what's in my driveway, but not yours, and you're dropping my property values!"
I'd park another Allis Chalmers in my front yard and prominently display a sign that reads,"4Q!"