Just in time for JavaOne (as many have guessed on the JDev forum) we are happy to announce a new version of JDeveloper 11g called JDeveloper 11g technology preview 4 out there on OTN.
It has a lot of bug fixes, some performance improvements and some new features. This is still not the final version and there are all sorts of new features that we already added to newer builds internally and they will probably make it to the next preview/beta.
In the meantime enjoy this new version.
(Note - you'll need a customer account with metalink in order to test the SOA and WebCenter pieces - sorry but those are new regulation from our legal department)
Let us know what you think on the JDeveloper 11g forum