This week the Muslim Brotherhood was in the news concerning its gains in the Egyptian elections.
For further information on who they are try these recommended resources.
This is the official english website. Though I have seen it blocked. http://www.ikhwanweb.com/
BBC News has a basic profile.
Al-Jazeera has special sections with background information. For keeping up to date with the latest news try their Egypt live blog.which has tweets and video coverage of events from reporters in Egypt.
PBS has some documentary and interview material discussing the aims of the movement.
The Council on Foreign Relations has a backgrounder on the history of the movement prior to 2011
The EU Institute for Security Studies- also has a 2011 report on the Brotherhood and Egyptian democracy.
finally always good for searching for high quality research papers from international organisations. Human Security Gateway