By Sara Nunnaly
Thursday's [April 14] BRICS Summit will likely focus on what the big emerging markets can do about high commodity prices, finalized by the usual joint statement on global governance signed by the nations' leaders. It'll be their third meeting. With each passing year, the ad-hoc group gets stronger economically and politically in world affairs.It's a motley crew, indeed, that's going to meet Thursday in the south China resort city of Sanya. Brazil, Russia, India, China -- and newcomer South Africa -- are as diverse economically as they are culturally.