Javaone is over for me, and I'm back in the office - time to reflect...
Most of the sessions I saw were in the 304 room under the tools category - basically I went to checkout the competition.
Overall, I can say that JDeveloper in terms of functionality is very well positioned - we had most of the features that the other tools were highlighting. But, there are always features we could add so here is a list of things that will be nice to have in JDeveloper - a selected feature from each of the sessions I saw:
Netbeans - Their upcoming Swing editor
JBuilder - Their screen sharing (we can do that with the Oracle Collab Suite - but it would be nice to have it as a core feature in JDeveloper).
Studio Creator - UI first and databinding to business services later - ADF builds the business services first and then creates the UI.
Eclipse - The number of developers using it :-)
At this point after supplying some information to the competitors, I should probably highlight all the JDeveloper features they can use in their tools - but I'll leave it to them to plan their development roadmap