Heya all! I didn't even know this forum existed until I was linked here from FiMFiction.
I started a story on the premise "Celestia vs Nightmare Moon" and it's expanded beyond that into what will end up being quite a lengthy story spanning both time periods (NMM era and present day), so if you're bored enough to check it out and decide to stay for awhile, you're in for a long ride!
http://www.fimfiction.net/story/16112/whispers