Postal 2 is one of the most underrated games of all time. Far too few saw through its puerile (though honest) window dressing to the technical and design excellence beneath. AI was uniquely reactive, the game system more consistent than any GTA has thrown up; on a design level the freedom of interaction and cunningly volatile world were constantly involving.
Postal III was almost definitely dead. Their website was only getting more schizophrenic. Announced back in 2008, I can't say it's ever looked very likely to be as exhilarating and ground breaking as its prequel, but I'm trying to hold the faith, and screens of badger-guns help, as do new videos.