I've been following the Barrick Gold story personally for the past couple of months. It's a Canadian Mining Company that sets up shop throughout the world and partakes in some unethical practices, displacing indigenous peoples, terribly degrading the environment and there are many reports of their security forces abusing the peoples of the countries they set up shop in. Recently Jethro Tulin, an indigenous person from Paupa New Guinea was in Canada on a tour to bring awareness to this unfolding tragedy, various divestment plans have come to fruition since of Barrick Gold and criticism has come from the Canadian Parliament : http://www.youtube.com/watch?v=UBcw7tht8Dg as well as other circles.
A great website (the source I first heard of this story from) is http://allan.lissner.net/ Alan Lissner is a full-time activist who is quite well-travelled and his site has loads of information on this story, as well as others from the local to the international scale.
The video features Jethro Tulin at the UN Permanent Forum on Indigenous Issues