NELSON Mandela, anti-apartheid icon, Nobel peace laureate and South Africa's first black president, celebrated his 90th birthday Friday by speaking out against poverty. In a rare interview at his home in rural South Africa, Mandela was asked if he had a message for the world. "There are many people in South Africa who are rich and who can share those riches with those not so fortunate who have not been able to conquer poverty," he said. Mandela added that he was fortunate to have reached 90, but lamented the fact that the poor are not likely to live that long because of the increasing gap between the rich and poor.  Mandela was also asked if he wished he had had more time with his family during a life spent fighting injustice. "I am sure for many people that is their wish," he said. "I also have that wish that I spent more time (with my family). But I don't regret it."  All week residents of Mandela's village of Qunu, his childhood home 600 miles south of Johannesburg, have been making preparations for the celebrations. Events planned include a soccer festival, a pop concert and lunch for 500 politicians, veterans of the anti-apartheid struggle and other guests at his home Saturday. An exhibition of letters that children wrote to Mandela and the late U.S. civil rights campaigner Rosa Parks will be displayed at the Nelson Mandela Museum, a short distance from his house.