While Le Bloc Notes was already using an older version of Drupal (4.6.5!), OHPE migrated from Mambo/Joomla. No change in looks nor functionality to the end user, although I must say that Drupal (particularly version 6) is much much nicer to work with than Joomla.
I had to put together a small module to integrate the E-publish module with mailing lists.
