Oh, look, they made another Dan Brown movie at some point. Angels & Demons deals with the deep dark secret organization, The Illuminati, and their attempts to control the world, which means you're probably going to be hearing a lot about that in the next few months on certain, paranoid websites.
Yes, wide-ranging conspiracy theories aren't limited to pulp novels reenacted by a terrible Tom Hanks haircut. YouTube and Digg comments and countless blogs are full of people ranting about the secret elite who are out to enslave all of us.
They have a lot of reasons for believing the following groups are the guilty parties behind everything wrong with the world, and most of those reasons are very, very retarded.