By the lights of a globe-trotting do-goodnik, South Africa is an ideal place for a conference: As an African country, the choice of locale bespeaks solidarity with the world's poorest continent -- yet its major cities are full of the plush hotels and decent restaurants NGO types secretly cherish. Unfortunately, there's something about the country that invites snafus. We do not predict a happy ending for this week's World Summit on Sustainable Development in Johannesburg. Things started going downhill two years ago at the 13th World AIDS Conference. Invoking his privilege as national host, South African President Thabo Mbeki told...