I tried to give Rust a try to build some stuff but my project required HTTP and there's no easy SSL solution in place right now. Hope it comes along. I don't have time to contribute much otherwise I would.
To quote Brian Anderson (the OP), one of the next steps in the I/O rewrite is "Implementing a new HTTP client on top of rt::io, possibly using Chris Morgan's HTTP code, for use in Servo". So hopefully within the year we'll see the beginnings of a robust HTTP lib that's worthy of a Mozilla-brand browser engine.
