We're in the process of adding some tutorials to this site to help the community integrate UDM4 with various third party applications. In the "Support" section, we now have a new area:
Integration with third party systems
So far, we have one tutorial up for integration with osCommerce
If there is a third party application you would like to see in this list, please post here. If you would like to share your experiences or submit you're own tutorial, please feel free to post as well.
We hope this helps you with your UDM4 integration needs.