[TunerSTK]

Brian I love Joomla for quick-n-dirty. Drupal 7 may really give it a run for its money in the sense that it will be easier/faster to get the same results.
That said I always get the feeling of complete chaos when working with Joomla.
Don't get me wrong Drupal is no model for organization, they just seem to have a more coherent long-term development strategy and leadership.

I would think it would not be to hard for X-cart to be built in a way it could easily be adapted to other php CMS being it sounds like it is a standalone app integrated into Drupal.

But Yah they would get a lot of people using it in Joomla if they integrated it into that CMS.

Scott