We are upgrading from Drupal 6 to Drupal 7 - but using it as an opportunity to clean house as well. So I have built an entirely new D7 site and moving content over page by page while cleaning it up. However, we have several content types with large groups of nodes (500+) that we would like to just migrate over to the new site as a group. I've tried several modules in Drupal.org and haven't had much luck in making it work.
Does anyone have some suggestions on how to move large groups of nodes from one site to another? Or a good how-to article online?