Hello! A couple of months ago I translated the first part of the PF documentation (there is no time for the rest). But publish recently. I think many documentation will be useful, and maybe someone even wants to help in this matter, which would be just great.
From myself I want to add that PF is a great firewall, it has great capabilities and at the same time its syntax is very simple.
PS If you have any comments on the translation, I will be glad to hear them.