What is the main idea of the news item? [originaltext] In the face of interna

In the face of international pressure, the South African President Thabo Mbeki has allowed the African Union and the United Nations to join his mediation efforts in Zimbabwe. Mr. Mbeki will remain the main mediator between the Zimbabwean government and opposition, but he has agreed to consult regularly a new reference group, including the AU and UN. This report from Grant Ferrett.
    The new broadened mediation effort in Zimbabwe was announced in Pretoria after a talk between President Mbeki and the head of the African Union and an UN envoy. The South African government presented it as an endorsement to Mr. Mbeki’s efforts over the past year. But he’ll no longer be able to act alone, and will now have to liaise with his AU and UN colleagues. The announcement was welcomed by Zimbabwe’s opposition which had complained that Mr. Mbeki was biased in favor of President Robert Mugabe.