Borderlands fans can already enjoy the game's first round of DLC (downloadable content), which introduces an entirely new area, new enemies, new weapons and more.
The Zombie Island of Dr Ned
really needs to explanation; it's full of all the creepiness you'd expect with the stunning art style of Borderlands coupled with plenty of gore and the series' tongue-in-cheek narrative and story-telling. It also just happens to be available for all current supported platforms (November 24 - presumably U.S. time), so make sure you get into it.
Oh, and here's a trailer