Aren't familiar with this term? See what the 'Digg Effect' really is.
To survive the 'Digg Affect' you need to arm yourself. Check out what you can do to safeguard your site...
The big thing to do on your end is to make this article as fast to serve up as possible. The best way to do that is to make it a static HTML file, rather than part of the Drupal, Joomla, WordPress, etc. site you have now. That can be served *way* faster than a PHP file, especially something relatively intensive like Drupal, Joomla, WordPress, etc.