From Yahoo Financial News :

Oracle today announced that it is expanding its leadership role in driving developer adoption of the next-generation enterprise Java platform by spearheading a project within the Eclipse open-source community to support the Enterprise Java Beans (EJB) 3.0 specification... By bringing EJB 3.0 support to Eclipse developers, Oracle provides access to a first-rate development environment for EJB 3.0 and further demonstrates its commitment to the entire Java developer community. As the leader of the project, Oracle will help build an open source EJB 3.0 Object-Relational Mapping (ORM) tool under the Eclipse Public License that focuses on design-time tooling and supports deployment to any J2EE-compatible application server. The new tool will build on Oracle's expertise in persistence with Oracle® TopLink, a Java object-to-relational tool and deployment platform that provides advanced ORM capabilities suitable for mission critical enterprise applications.

Also from CNET :

The Eclipse project will create an Eclipse plug-in that will allow a developer to model how objects written in Java can "map," or connect, to data stored in relational databases.

See the Data Tools Project Proposal for more details.