I am checking into this module here: http://drupal.org/project/moodle

 We have two government agencies that have both a Moodle and a Drupal site.

I would like to find a way to make this tool work on a Drupal 6 site.

One of the main problems we are having is that navigation between the two sites can be sometimes jarring and confusing to the user. The themes are somewhat similar between the systems, but it would be a much smoother ride for the e-learner if they could stay wrapped in the page and not leave the site.