Calvary Chapel Grants Pass came to us with a Drupal project in need of rescue -- three separate websites all with the same theme, but with different functions. A previous developer had left them with broken sites ... images that would not display and a cumbersome process for getting their audio library online. Tweaking Drupal did not resolve the problems, so the first step was to move all three sites to a Drupal friendly hosting environment.
This site was in an old .asp CMS format that had to be migrated to Drupal. Most of this process was a manual process as there was little similarity in the structure of the databases.
Clara's shopping cart runs on Interspire. One of the core themes was heavily modified to produce a near match for the corporate site (Corporate site in the process of porting to Drupal).