a few places to start:
Overpopulation is a myth |- a nice website about the subject.
or go staright to the source:
WFP | United Nations World Food Programme - Fighting Hunger Worldwide
Hunger[Inflammatory word removed. Please be civil and respectful]| FAO | Food and Agriculture Organization of the United Nations
both of these websites are no joke. they use current data and statistics to back up their claims.
Please read them carefully, and if anyone can find the mit study, or another study i will be interested to see them.