Hi, it's me, Narrator 1, the author of the Index/Madoka crossover, To Aru Mahou Shoujotachi no Monogatari, on FF.net.
I just wanted to stop by to let people following my work know that I'm working on Chapter 6, which keeps Homura as the point of view focus but also continues to involve Index as a primary player. Chapters 4 and 5 (which were originally one chapter but had expanded in word count until it eclipsed the first three put together) involved Homura and the circumstances that led her to Academy City, but Chapter 6 will pick up where Chapter 3 left off.
All of the above was largely a copy-paste of a post from the Index forums.