Ars ludi is a cool gaming blog. It's the one that gave me the idea for this little redbox experiment.
One of the things the author does is come up with what he calls "plugins", little rules additions you can drop into any game to jazz it up. Here's one called the Blame Game:
It's a way of blaming PCs for when things go wrong, people die, etc. And the best part is it's purely for roleplaying fun, so it works with any system. He wrote it for an Aliens inspired game and says it's best suited for "tour of duty" type games, but I think it would work really well for a game about large teams of semi-competent adventurers, trapped in an unforgiving and lethal underworld!
"This is all your fault, Fancypants!"
Vancouver Red Box: a site for old school D&D