I know it won't be coming to GOG for many years, but so far, it looks like Postal 3 is basically going to use a modified Saints Row 2 or GTA IV engine. In fact, it looks like a Postal version of those games, but a slightly gorier and more cartoony version, less so than I would expect. To see the trailer, go to gopostal.com. There are links on there if it isn't there anymore.

[url=]http://www.gametrailers.com/player/47163.html[/url]
And it's running on the Source Engine. :)

Looks pretty good in my opinion. :)

Gotta love the hand held attack badger.

i cant wait to get my hands on postal3!!!!!!!!!!!!!!!!!!!

So far it looks much better than Postal 2. Probably much less buggy, and no more standing in the hoods of cars.
Hopefully it'll have more a bit more gameplay than Postal 2.

YESSSSSSSSSSSSSSSSSSSSS

From what I've seen, Postal 3 looks great!
Oh, and since it runs on the Source engine, GARRY'S MOD BABY!!!!

Haha awesome. Killing people on a segway = WIN.

Drive-by shootings on a Segway? Badgers as WEAPONS? Oh, it's Postal, all right.
Not sure about the third-person view, though. It just doesn't feel right that way, since Postal 2 was all about putting yourself in the Postal Dude's shoes, so to speak. (That, and they can't really surprise you with things like suddenly finding yourself in a gimp suit...)
The other thing I'm not sure about is whether or not it'll have Postal 2's signature dark humor, both through occasional one-liners and subtle things you see in the environment around you.