I really don't understand how HN works. Why is this post on the first page? I am currently using Haskell, and even for me this post is not very useful (I would search for a some kind of network stack lib when I need it)...
Because it's an interesting and unconventional project. I admit that a simple Hackage link is not really interesting by itself, but together with a nice blog post, this would have made a really interesting read.
here's the deal: you will remember having seen a network stack somewhere because of this post. the day you will need one, you will know where to start looking (or even if you forget the name, you will be able to describe it).
it happened to me so many times. an article, a module, a piece of code. i would go back and search reddit and HN for posts.
Hacker News often contains interesting bits about and around.
Sometimes I search HN for front page items because I remember that discussion about them contains interesting opinions and links. I cannot find them directly because do not remember what are they.
I think this is exactly the stuff that needs to be posted. I've seen dozen startups that their whole business is to support language or platform - clojure, sbcl, scala, lua, etc.
And the HaLVM, one of the platforms on which HaNS runs, http://halvm.org/
Galois uses it to build OS-less, pure Haskell network appliances, and to quickly design new protocols, or modifications of existing ones.