Anybody done any serious work in Rust <http://www.rust-lang.org/> and have strong opinions on it, good or bad?

I've been dabbling in C++11 to refactor some common code between web, iOS, and Windows for my media player experiments <https://github.com/brion/OGVCore> and while "modern" C++ is a powerful language with amazing templatey goodness it's full of "undefined behavior" and gotchas.

Seriously considering diving into Rust once the emscripten JavaScript cross-compile story is worked out a little better...