Bono, Bob in Nobel running
Experts are divided about whether the secretive five-member committee would dare to broaden the scope of the $1.3 million award in 2005 to honour Geldof or Bono, who have campaigned for years to ease hunger and poverty in Africa.
Last year, the committee won both plaudits and brickbats for awarding the prize for the first time to an environmentalist, Kenya's Wangari Maathai, for leading a campaign to plant millions of trees across Africa.
