You can find a new How-To Document that explains how to use OC4J and Eclipse together using the Lomboz plugin.
You can download the server definition files for the Production release of OC4J 10g (9.0.4) or for the J2EE 1.4 Developer Preview 10.1.3.
You can now find a preview of the Oracle Toplink & framework integration. This allows you to easily use Toplink features in your Spring application.
You can download it from OTN Web site.
As you may know this is Oracle Open World this week in San Francisco... I am working there all week mainly on the OC4J and JDeveloper demo pods. Come to see the new version that help you to develop J2EE and Web Services. Also I am presenting Thursday at 4pm a paper about Service Oriented Architecture (SOA) and Event Driven Architecture (EDA)
I invite you to join this feast... if you can not take a look to the OTN at Oracle World blog, that highlights important keynotes, session and demoground activities...
You can also take a look to the official Oracle Open World Web site