At the the drupal.be code sprint I worked on a module to download Drupal and accompanying translations and make that package available for download. This functionality has turned into the packager module with some extras. It is now also possible to make the package download modules and include them in your download. This makes it interesting to set this up on a local Drupal install so that you have your own Drupal distro with your most often used languages and modules. And always up-to-date!