We've added the Incoming Changes tab to the Pending Changes window - so valuable if you want a sneak preview of what changes others are making to files you have in Working Copies in JDeveloper.
Also, you can now filter Pending Changes at the application or project level.
But best of all, we've added support for Branch/Tag, Switch and Merge. I've created an online demo that you can play from OTN. If you haven't already, download the 11g preview and try it out - I'd love to have your feedback