I haven't yet, but I want to. The problem is that the first story is a terrible badfic and would have the be edited massively. but the sequel is so shiny ;)

In general, I have ambivalent feelings. Sometimes, sequels can enrich a story and add much more to it, making it better. Sometimes, a sequel can be just superfluous and not half as good as the original story. This especially when it takes away from the impact of the end of the story. Therefore, I didn't write some sequels I did have ideas for.