You've probably seen some of their stuff on YouTube before. "The Chaser's War On Everything" is apparently now on US TV (G4). They are a comedy troupe known as The Chaser who started with a satirical newspaper (like The Onion), moved into political comedy (fake right-wing news). Eventually they did this sketch show.
They are currently filming a new series, which has got them arrested at the Vatican. Here are a few clips from The Chaser's War On Everything: