I finally finished migrating http://www.ogre.com/ to Drupal v6. This was a pretty painful experience, as usual with Drupal, but not as bad as the Sharks site upgrade. The biggest pain is usually "complex" modules like Views and CCK. In particular, the Views module does a piss poor job of converting the old views to the new version... Expect to change a lot of configurations after the migration :-/.

The other pain right now is that the Node Relativity module is not functional for Drupal 6. This mean that some navigation of this site is currently broken, I hope to have it fixed as soon as possible.