What are you doing here - go to OTN and download the new Oracle JDeveloper 11g R1 (188.8.131.52.0) - code name Bulldog.
Major new features include:
* Oracle Team Productivity Center - Hot Pluggable ALM solution for JDeveloper
* Oracle MDS - Declarative Customizations and Personalization
* SOA Development - with the new Oracle SOA Suite 11g
* WebCenter Development - with the new Oracle WebCenter Suite 11g
* Oracle ADF Desktop Integration - build Excel frontend for ADF
But there are hundreds of new features detailed here.
We also have new tutorials, new demos, new developer guides and more.
All are on the JDeveloper page on OTN.