However the question remains whether Lua is the right candidate for the job, being not-so-open yet. Obviously the hacker cultures in NetBSD world and Lua world are still quite different, so I see no official integration in any foreseeable future.
A lightweight LISP or Scheme, on the other hand, might be a good candidate for a long-term implementation of the article's claims.
Apropos Lua not being 'open', or a 'bad language', as a user of Lua on a full-spectrum approach, I can definitely say "meh!" to all nay-sayers. For every detraction, there is a significant advantage. LuaJIT, cache-coherency, access to high-performance components, well-compartmentalized, due to a simple discipline .. these are the things to love about Lua. But please, anyone not yet familiar with the subject, approach Lua not critically; from the perspective of the progressive, if you haven't grok'ed the way you can drop the VM into anything and pass it byte-code, then please do this first. Grok the VM, guys. Fact is: Lua can be glommed onto anything.
Any-thing.
http://www.abstractnonsense.com/schemix/
But Schemix has been inactive since 2003.
Lua is open, as their about page (http://www.lua.org/about.html) states:
Lua is free
Lua is free open-source software, distributed under a very liberal license (the well-known MIT license). It may be used for any purpose, including commercial purposes, at absolutely no cost. Just download it and use it.
There is also a large overlap between people who use NetBSD and people who use Lua, probably due to the fact that they are both relatively small C based projects that try to do one thing well. Indeed the linked paper is written by two NetBSD commiters, the main author of Lua and another person on the Lua team.