Matt McAlister :: Washingtonpost.com and CJRDaily first major publishers to add del.icio.us button
http://www.mattmcalister.com/blog/_archives/2006/2/22/1777920.html
I think it's critical for publishers to think about ways to enable their users to utilize content in more ways.
washingtonpost.blog - washingtonpost.com Partners With del.icio.us
http://blog.washingtonpost.com/washpostblog/2006/02/washingtonpostcom_partners_wit.html
"The deal allows us to offer tagging capabilities on all articles on the site. The service launched on February 23."