http://www.mediaminer.org/
It haven't looked at all of it, but it has just about everything anime you could hope for, and some you didn't even want. Some of it is bad, some of it is good, and you can probably find some MiSTing Gems in with the fics that you look at. It's a lot better than FF.net simply because they don't take as much crap. They haven't banned certain things from being shown simply because they got complaints. So they have all fanfiction fron G to NC-17, if you wanted to riff that stuff. And it works on a system similar to FF.net with a touch more enjoyability.
So look for something and bomb the hell out of it.
-Sherlock
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