The 1950's movie Day.
It's simple - you can swear, but you have to swear as if you're starring in a 1950's movie. So you can say Blast, Dagnabit!, Cripes! and Fooey Special dispensation for the words Poo, Bollocks and Lick me
It should be interesting. I think I'm up for it - we're talking about 12 hours on a minesite with no four letter words that would carry a warning on prime-time television - but it might get dicey. So I'm keeping my fingers crossed.
And on an unrelated note, there's this show on the ABC right now that's a British mini-series (I think) and it's starring Robert Vaughn as an American con artist. I think I may have a tiny squee - he's being so rakish and devilish.