The future of the Simandou iron ore deposit currently lies in limbo as the government must first decide whether to honour previously negotiated deals, or demand better terms. One of the companies involved is Rio Tinto. Former British Prime Minister Tony Blair is advising the Guinean Government.
See http://www.mineweb.com/mineweb/content/en/mineweb-political-economy?oid=166359&sn=Detail.