I had a look at it and it sounded pretty cool. The one thing I found unfortunate is the lack of separation between safe and unsafe code, but it certainly has a lot going for it.
There's no such thing as safe code. So to do as you suggest requires some set of suitable concepts of relative safety, together with some way to enforce them. I am very interested in implementing mechanisms that provide guarantees. And not just safety. Another would be licence management (e.g allow only BSD licenced code to be used) .. that's a legal safety guarantee :)