More details from other team members..

I said I'd add in the detail about the Export DDL and just how it's done, and I will... I do just want to point out that Kris and Donal have written up more specific details about the 2 main aspects of SQL Developer 1.2. So, if you've not already seen them:

Kris and the APEX updates: SQL Developer 1.2 will support the upcoming Oracle APEX release.

Donal and the New Migration Workbench: Donal walks through the top new features and what you can expect from the new integrated Migration Workbench.

Enjoy!