Story : Taking the stage this week are: Shadow Minister for Defence and leader of the opposition in the Senate, Nick Minchin, the Minister for Housing and Status of Women, Tanya Plibersek, political journalist and author of "Poll Dancing" - a satirical look at the 2007 federal election, Mungo MacCallum, the Director of the IP and Free Trade Unit at the Institute of Public Affairs, Tim Wilson and author, essayist and playwright Linda Jaivin.