Today, Ubuntu 7.04 Feisty Fawn has been released, and the number of visitors to the site must have skyrocketed.
Either the site went into throttle mode, and hence no blocks are visible, or Canonical have replaced the front page with a plain HTML page. The only thing on the main page is links to mirrors for download, and the logo (from the Drupal theme directory).
They also have a static copy of the site as well.
I am wondering if this was planned ahead of time or a spur of the moment reaction. Also, is this the best course of action, since Drupal is known to scale well provided a good tuning and optimization effort is conducted.
Just in the last 2 weeks, a large Drupal site that I maintain was on digg's front page two times, and was on boingboing as well. It kept on going fine under the onslaught. The site is hosted on Ubuntu 6.10 by the way.