The ADO.NET team has released a demo of their Entity Data Model Designer. This tool demonstrates some of the Object-Relational Mapping (ORM) features planned for ADO.NET vNext.
The Entity Data Model Designer allows developers to separate the logical schema from the actual database schema. Benefits include a reduced need for joins in code and the ability to isolate code from database schema changes. Other concepts such as inheritance are allowed
This demo requires the May LINQ CTP and the August ADO.NET vNext CTP.