We have just published a new technology preview version of JDeveloper on OTN.
The key thing that is new in this preview is that it now includes the SOA and WebCenter bits, and you can use them to preview what is coming up next in the Oracle Development world.
On the Java side there are various new features that have been added and polished from the previous technology preview.
We also added a couple of new online tutorials on:
1. The graphic,map, gauge and other data visualization JSF components.
2. An updated coding editor beginner guide
3. A review of new features in ADF BC
Check them out on OTN: