A very large and popular site was upgraded from Drupal 6 to Drupal 7 which was a large undertaking. I did not do this alone, but with the help of a fellow developer we were able to migrate over thousands of users and data from the old database structure to the new one. We also changed the look and the feel to go with the new branding. Currently with it being outdated, we are in the process of revamping the site for a total make over with the new brand. This is a huge team effort and requires a team effort from the planning stages across all departments to photography and graphics and then to me who will put it all together with one other co-worker into a senseless masterpiece.