Agence France-Presse: The leaders of the world’s wealthiest nations will be conspicuous by their absence as more than 60 heads of state and government gather in Rome this week for a UN summit on the plight of the planet’s billion hungry. Italian Prime Minister Silvio Berlusconi is the only leader from the Group of Eight industrialised countries expected to attend the “Hunger Summit” from Monday through Wednesday. Pope Benedict XVI will be among the inaugural speakers at meeting at the Rome …