Might be a good idea to put a canonical tag on the old to the new content.
http://archive.wired.com/wired/archive/1.02/crypto.rebels_pr... > http://www.wired.com/1993/02/crypto-rebels/
http://archive.wired.com/wired/archive/1.02/crypto.rebels_pr... > http://www.wired.com/1993/02/crypto-rebels/
Also you can see at the bottom of the actual article on WIRED.com we did add tags to archived magazine content, like the article you mentioned, to group content together a bit. Thanks!
That being said, great work!
But I'm curious, usually platform changes go from Wordpress to Drupal because people need features other than a blog and simple CMS system. What made you go the opposite route?
(Sorry, I worked at an agency that sold a lot of oversold drupal6 projects)