List Integrity allows you to quickly establish a relationship between SharePoint lists to enforce various constraints and perform background housekeeping tasks such as when deleting an item in the parent list, all associated child list items are deleted as well - resulting in no orphaned data. In addition, you can include parent list column data in the child list forms as a reference for the user.
You can also check out the Bamboo Knowledge Base on List Integrity for answers to common questions and up to date Release Notes on this and all of our products. More detailed information is available in the Application Notes on this product.
Chris DooleyCommunity Manager