@kilian - we fully intend to polish the UI and make it look nicer, but you're right - we've been focusing on getting the backend working well, as that seems to be the biggest challenge. It could like all nice and pretty but people won't use it if it breaks. Looking forward to getting your feedback when you deploy your Django projects!
Requested access to the beta, I have a couple of django projects that would be nice to run on such a service.