We finally made some time to update our website! The old site was becoming out of date and difficult to maintain.
We are now using Drupal (Acquia Drupal to be specific). Acquia is a customization of the standard Drupal that includes a number of very handy modules. Acquia also contributes a lot to the Drupal project and offer support and services around Drupal. Have a look at their site if you are interested in a CMS: http://www.aquia.com

We are still working on the new site, so expect some changes and some typos. :-) We are fixing those as we pick them up.