I don't write on FF.net, but there's (I think) just one fanfic on my old DA account, http://chatroomfreak.deviantart.com . It's called "Speed Bump". I do write fanfic occasionally, but it's not really my strong point, so I don't have much to show for it at the moment. I do want to write a Sailor Moon x Pokemon crossover fanfiction some day though. Look out for it!
... Actually, this question made me go and try to sign up for FF.net, and now I realise that I've actually had an account all along! So, I set it up again. I might put something on it in the future... for now, my pen name is voraciouswriting.