Import database schema.
It's certainly state of the art for code generators to generate working database applications from a schema. It would be great for JIM to either import schemas directly, or to leverage an XML intermediary file, like the project files from PHPRunner.
This might seem backward, stepping back from working executable code to a prototype, but if Reports and Usernote's Commenting and User Testing Integration continue to improve, they can add considerable value, in my opinion at this time. Anyway, especially if both the code and/or the prototype fall out of the same project file, it seems a nice bonus.