Hello, As those of you tracking source changes may have already noticed, there have been various improvements to NPF over the last few months (e.g. support for dynamic NPF rules). NetBSD 6.1 has recently entered Release Candidate stage, therefore wider testing would be more than welcome!
Additionally, I created a web page for NPF documentation: http://www.netbsd.org/~rmind/npf/ Hopefully, over the time, it will expand. There is a read-only GIT repository you can clone. Thanks. P.S. There is a potential GSoC 2013 project for NPF, see projects page in the Wiki! -- Mindaugas
