Interest rate announcements are of course the most important news events, but any other news report that can directly impact interest rate views (economic growth reports, inflation reports, etc) are also very important to watch (first-tier releases). I would recommend reading the following link, which enumerates the most market moving news events of 2006. It will probably answer most of your questions concerning this.
http://freeforexebooks.com/Fundament...rketMoving.pdf