KONY 2012 is a film by Invisible Children that aims to make Joseph Kony famous, not to celebrate him, but to raise support for his arrest and set a precedent for international justice. If you aren’t one of the 50 million people who’ve watched this short film in the last few weeks, it is worth watching to the end (it is about as long as a sitcom).
The Washington Post has several articles on this campaign and the situation in the regions where Kony is active if you’d like to learn more.