A slightly more indepth article is http://www.macworld.com/article/142129/2009/08/twitter.html http://www.macworld.com/article/142129/2009/08/twitter.html The

A slightly more indepth article is http://www.macworld.com/article/142129/2009/08/twitter.html http://www.macworld.com/article/142129/2009/08/twitter.html The technology they are attempting to protect is described here http://www.techradium.com/about/irisBrief.cfm http://www.techradium.com/about/irisBrief.cfm