Markus aka shutterlag started a forum thread with the same title. I found the link he provided so interesting, that I thought I put it up in my blog. With a bit of luck a few more people will have a look : the Big Picture . They will be rewarded with some gripping photography if they do.
The photo of a man called Ernesto, which can be seen in the series on Zimbabwe/South Africa, I will not forget any time soon (as that particular photo contains graphic elements, you can't see it right away, and you need to open it seperately).