This site was created by Jon Mason using Drupal, an open-source content management system.
I chose Drupal as, though it is a little harder to install/setup than it's competitors, it allows more flexibility in how your sites are setup. Though this site is quite a simple blog, I wanted to use it to experiment with Drupal to allow me to create more complex sites in the future.
Another benefit of using Drupal is there are a number of themes available that let you change the look and feel of the site quickly and easily. This site currently uses a modified version of the andreas01 template created by Andreas Viklund.