I think this is on topic for slug. The article is entitled "With New Software, Iranians and Others Outwit Net Censors". You need to register to read the article, but I found that BugMeNot passwords got me in.
http://www.nytimes.com/2009/05/01/technology/01filter.html?pagewanted=1&_r=1&hp http://www.bugmenot.com/view/nytimes.com -- Alan L Tyree http://www2.austlii.edu.au/~alan Tel: 04 2748 6206 Fax: +61 2 4782 7092 -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html