Maayan
What can be said about the Divine Comedy? Well, you can say that it is one of the most riveting fanfiction novels out there. You can say that the writing is tight and evocative, and that the characterization is excellent. You would not be completely off the mark if you pointed out that the original characters are interesting and original. And you wouldn't be alone. The Divine Comedy, Maayan's epic work in progress is, to put it simply, a great read.
At Maayan's request (and because she's right) I've provided an outside link to the Paradiso Index, where you will find all the stories to date, as well as interludes written by Maayan and Kita. (Who? Oh, Kita! She also rocks muchly.)