I agree, and they've done an excellent job with the tutorial documentation for it: http://doc.rust-lang.org/doc/tutorial.html

I particularly like the natives and testing support, but I agree with what you said; I wish there was a way (maybe there is and I just haven't figured it out yet) to do a reverse native thing; that is, create a C wrapper around a rust library (and then yes, use SWIG to generate a python / ruby / etc. binding for the rust library).