> but I think we potential users need to start seeing something more definite.
Why? A potential user isn't owed anything; Mozilla hasn't done a marketing push to capture you, gotten you to sign up for a developer program, or offered Rust up as the solution to any given problem you have. They haven't promised you anything. They're just tinkering with Rust like you'd tinker with a custom car in your garage. Also, unlike Perl 6, there's nothing that's laying fallow in an increasingly-desperate way while they work on Rust.
On the other hand, a programming language is forever. I'd rather have a programming language a decade late, that I can use for 40 years, than a programming language right now that gets outmoded after four.