The Max Planck Encyclopedia of Public International Law has been updated with 41 new articles, and an additional 37 existing articles have also been updated. These updates include new articles in subject categories of the Use of Force and International Humanitarian Law. New articles of note include Refugees, International Law of Cooperation, and Cyber Warfare. A revised entry on Piracy has also been included. The total number of articles is now 1,248. The next article update will be May 2011. For more details, visit www.mpepil.com
Thanks to Nik Speller for drawing my attention to this.