i planned on leaving the players in the dark for as long as possible, maybe not even putting any supernatural stuff in the first game. but they will probably learn the rules quickly, they (and myslef) are all rpg veterans, and have been playing for many years. and none of them have even really heard of the game, so they are totally in the dark as to what will be going on (mwa haha).
for the adventure, i was thinking of taking a lot from an adventure i read in an issue of dungeon magazine a long time ago, called "jigsaw", i think. its about a big, deformed circus freak that is terrorizing a woman that he has fallen in love with. they call him jigsaw because his face looks like a jigsaw puzzle, because of the scars all over it.