just watched the 'Fat Beauty Contest' tonight...wasn't too impressed to be honest...
as the OP said, giving the message that it's ok to be overweight is just as wrong in my opinion as the status quo, where models and typically 'beautiful' women are glorified in part for being incredibly thin. both are equally bad health-wise...
I have no problem with trying to prevent overweight people becoming stigmatised...but I think shows like this go a little too far.
the women in the contest actually turned against one girl after she revealed she was pregnant, because they thought she wasn't normally 'fat' enough to be on the show. to me it seemed a little strange somehow...