Thank you Heading Out for your travels and this recap. This type of post, the other contributors, and the subsequent comments are what make this site worth coming to day-in and day-out.
Does anyone else WANT a price shock to wake people up or is it just me?  Just checking.
Why does anyone listen to Pimental?? His numbers are always skewed so that he can prove his point. Two examples of bad numbers, although I am sure we could come up with many more

1) We are adding 205,000 people a day not 250,000 as you mention he states.
http://www.census.gov/ipc/www/worldpop.html
74.6 million per year/365
Also this number is declining every year.

2)  3.7 billion people are malnourished ! where the heck does he get that number?!
Most estimates show the count of malnourished as being around 800 million.
For instance the new Millenium Goals Report from the UN  says: - http://unstats.un.org/unsd/mi/pdf/MDG%20Book.pdf
"There were 815 million hungry people in the developing
world in 2002"

Since many of these 815 million live in South Asia and since that area has boomed since 2002. I am betting that this number has dropped substantially.

His comment about people eating too much in US is correct, although I am sure his numbers are wrong.  Eating too much is huge problem worldwide. I personally think obesity is already be a bigger problem versus malnourishment.