Blizzard chap Bashiok has posted on the World of Warcraft Forums with a smidge of gameplay changes in Diablo III; Player Killing (PK) is out, and PvP is in, apparently.
PK was a feature in previous Diablo titles but won’t feature in the newest game, said Bashiok, but a Player vs. Player system will be implemented for the game.
“We’re – in general – not big fans of griefing for any game. It’s really only ‘fun’ for one person, and that definition of fun isn’t generally something we’re going to want to encourage. It’s far more positive to encourage and support meaningful and skillful options and systems within a game, than a mechanic for people to instantly turn against one another for no meaningful gameplay reasons.”
More details through the link.