Reason #23 to use Twitter, beat the press.
Let's check out the feed for Oracle Press Releases:
Nope, nothing there.
On twitter though, you have the (in)famous Kris Rice, Product Manager or something in charge of SQL Developer.
Check out the Feature List.
Download it here.
Probably the biggest surprise, to me anyway, was the inclusion of a unit testing framework. Haven't had a chance to check it out yet but you can find a tutorial here.