The BBC had a poll a while back on who people would like to rule the world through a world government. It had Michael Moore and Noam Chomsky in it, so was an all around cringe affair.
Right Wing News did a survey of right wing bloggers of whom they would like in their 15 person world cabinet. Key people included:
Condoleeza Rice: US Secretary of State
John Howard: Australian Prime Minister
Arnold Schwarzenegger: Governor of California
Junichiro Koizumi: Prime Minister of Japan