I recc'd this and another post-GD fic: http://izhilzha.livejournal.com/28066.html

The one you're looking for is called Grave Survivors, and the author is jedibuttercup. I believe she has written at least two followup ficlets to this one, as well; and I bet they're all on her ff.net profile. (Grave Survivors was the only one I had bookmarked, unfortunately.)