I'm really looking forward to Rust, but I'm waiting until 1.0 or real close to then. My question is, when will 1.0 be? Is there a roadmap? A list of items to me

I'm really looking forward to Rust, but I'm waiting until 1.0 or real close to then. My question is, when will 1.0 be? Is there a roadmap? A list of items to meet before then? Is it just being worked on until the core team thinks it feels "right"? I guess I'm wondering what the goal is, and how the progress is judged against it.