Fan Fiction (any good stuff?)

I visit fanfiction.net more, so I'll give my opinion about fanfiction I've seen there. One of my favourites is 'Iris' by Rhyianna Merquise which is an Aragorn/Arwen short story and a song fic. 'Legolas and Nimrien: The Song More Fair' by Tian was written very Tolkien-like with a background of Unfinished Tales.
'To Love a Mortal' by LadyoftheRings is very good (up to chapter nine but that's just my opinion) and focuses on Elrohir. It has two sequels I believe but I haven't read them yet.