The AP has picked up the leaked summary of the WGII report in this article by Seth Borenstein.
Again, we won't know how accurate it is until the report is released. This article highlights that although some food-growing areas may see a temporary increase in productivity, the result by 2080 is widespread starvation in the poor regions of the Earth.
The article is mostly gloomy but concludes with the hopeful, and true, statement that most of the negative impacts on humans can be avoided if we take action "within a generation" or 10-20 years.
Update: More gloom. Yahoo news titled this story "New Climate Report: More Bad News"