Whitehouse.gov now powered by Drupal
highervisibilitywebsites.com
highervisibilitywebsites.com
I would guess all that is publicly accessible is static and being served from Squid or Varnish.
Good luck taking advantage of any Drupal security hole.
Much of Pressflow's codebase was backported from Drupal 7, so its advantages will be available to all Drupal sites after the stable release of version 7 sometime early next year.
All Drupal 5 and 6 sites can use these features by substituting the Pressflow core.
Now I'm wondering how the US government will contribute back to the Drupal project.
Actually a pretty reasonable write-up of open source advantages.
Unless you are suggesting they use ATA-over-ethernet or something like that to share the same drive.
Or maybe you meant to be worried that they might use virtual machines where one is running the .gov site and the other would be mail server or something like that ?
At the volumes of web traffic they receive there it would surprise me if they only had one server to do just whitehouse.gov, especially if they're using drupal.