I am not well versed, but I am going to float this idea: I think there is a good case for Annie Proulx to be the recipient of the Nobel Prize for Literature based upon the phenominal effect the story Brokeback Mountain has had on people the world over.
Checking the Nobel website :
http://nobelpeaceprize.org/ I find the following can make a nomination to the committee:
members of national assemblies and governments;
members of international courts of law;
university chancellors; university professors of social science, history, philosophy, law and theology;
leaders of peace research institutes and institutes of foreign affairs;
former Nobel Peace Prize laureates;
board members of organisations that have received the Nobel Peace Prize;
present and past members of the Norwegian Nobel Committee; (committee members must present their nomination at the latest at the first committee meeting after February 1);
former advisers at the Norwegian Nobel Institute.
So in the US, someone on the congressional level or higher, or more likely someone high in academia would have to be lobbied. Perhaps nothing would ever come of it, but to borrow the words Ossana and McMurtry put in Alma's mouth: "I think it would be nice."