Have you seen the mio library for async IO in Rust? I haven't used it myself, but everyone that I've asked has had nothing but glowing praise for it (though it doesn't yet support Windows): https://github.com/carllerche/mio
I've used mio and I also have nothing but praise for it, but it is a fairly thin abstraction over epoll/kqueue. That's certainly useful, but it's not nearly as nice or easy to use as the green threads that haskell gives you.
(That being said, I think 'woeful' is a pretty strong word to describe the situation. Sure, Haskell is nicer in that regard, but most other languages aren't.)
