I don't have much info on this yet, but Barkers600alive is a prostate cancer promotional stunt involving 400 (why not 600?) topless men and women spelling "600" in a soccer stadium in New Zealand. Below is an official pic, but the vids tell the story.
In the vids, the women cover their boobs when not lying on the grass. That is why I am putting this in the ENF forum.
Sprinkled about these two vids are several covered boob moments. I'm willing to bet there are more pics and vids out there.
http://www.youtube.com/watch?v=Q72HkjL5O2U
http://www.youtube.com/watch?v=HDUkyl0EPPA
I will post more if I find it.
enjoy,
Klondike