pingVision presented a case study of the migration of the Popular Science site to Drupal. Since I'm joining Moshe Weitzman in Cyrve, specializing in content migration, this was of particular interest to me.
The source content was a combination of Typepad blogs, and Vignette content (1.66GB worth of Oracle data, along with 15,000 images).
to be continued...
pingVision has posted their case study to drupal.org - definitely worth checking out!