I'm working on NetBSD kernel I/O bindings for kernel Lua under lneto's mentorship. That work continues salazar work luaio.
Currently, I'm fixing known issues (and searching/creating new :D) and improving salazar's patches. One of the main problems with current luaio implementation is performance.
http://gnats.netbsd.org/cgi-bin/query-pr-single.pl?number=52225
http://gnats.netbsd.org/cgi-bin/query-pr-single.pl?number=52226