Alright, I realise this is a bit late (2 months late, give or take), but just yesterday me and my 3 close friends got together to play a 4-way game (750pts apiece, because timing - the armies were Blood Angels (me), Tyranids, Dark Eldar and Imperial Guard). We decided to use the Death Worlds rules in the game - if you haven't got it, this was an expansion included in a recent White Dwarf which meant that at the beginning of each person's turn, the player would roll to see which result he would get on one of the 4 "Death Worlds" tables. These were usually either dangerous or amusing (or both) effects that could range from affecting a single unit to the entire board.
It was HUGE fun. I loved the element of sheer unpredictability it added to the game - half the time, the results that came up would be useless (any terrain-based hazard generally did nothing, as there wasn't that much terrain on the board and always too few units in it at any given time), but the other half could turn out to be absolutely devastating. The IG player decided, this time, to make an insane army list consisting of about 3 seperate full Psyker Battle Squads, a couple of Psyker HQ choices (though that's me guessing, they could have just been upgrades to the squads) and a whole shitload of penal legion troopers. At one point about halfway through the game, somebody rolled "The Swarm" result - which caused a swarm of hungry mind beetles to come out of nowhere and attack every psyker on the board, killing the majority of the IG psykers in one fell swoop (and to add insult to injury, it happened again later and killed off the last of them). Another time, the Tyranid player's turn had just started - he had a Zoanthrope standing atop a building, about to blast a neat little hole through my exposed Land Raider - my second-last unit left (the other unit being inside it). He rolled a "Rain of Vitriol" (awesome name) result, which caused acid rain to come down across the whole board - any model under open sky was affected, and this included the Zoanthrope, who hilariously melted to death in his own turn just before he could kill me. 3 of us got the "Meteor Storm" result at some point, allowing us to rain down a series of powerful large blast templates anywhere on the board we wanted - the DE player got this twice, the bastard (must have been some dirty trick involving webway portals and an asteroid field). Indeed, these three hazards were responsible for the vast, vast majority of deaths in the Imperial Guard army.
One of the more potentially hilarious results we got that sadly had little effect (context prevented it) was called "Rain of Oil". This makes the entire board difficult terrain for all infantry... but it also means all immobilised vehicles can move as normal for that turn. Including, presumably, Drop Pods. Man, if only any of us had actually brought some of them for the occasion. One we didn't get was Seeker Lightning, a powerful lightning burst which targets the model on the board closest to the ceiling - the existence of this hazard caused us all to become massively paranoid and start fishing out our shortest models in a sort of arms race, but it never once appeared.
What do you guys say? Anyone else used the rules? Any funny stories to share?