For those interested in migrating from Joomla 1.0.15 to Drupal, there is now a module we're playing with called "Joomla to Drupal" that boasts the following capabilities:
- import Joomla Users
- import Joomla Sections & categories
- import Joomla Contents & Static-contents including images/pictures
I'll keep you posted as we progress on this but it's nice to see a module that is generally available for simplifying the move.