Martin will be contributing a short story set in the Game of Thrones universe to the anthology Book Of Swords. There's no word as to what characters will be featured in the story just yet. By "featured" we clearly mean "murdered." This is a work of Martin fiction, after all.
We like to imagine Martin's characters are self-aware and they know when he starts writing about them, there's a pretty solid chance they or someone they love are about to die. They're all valiant, though, so they handle it pretty well.
Come At Me, Words!
Don't get too excited, though. Fans of the series won't be seeing a reprieve any time soon. They're going to have to keep waiting almost a full year.