maybe that's a better term than fanfiction, b/c it requires the community

I give it my blessing! XD

And yes, I think intent to publish would make it the same as published (so the example alixtii had somewhere else of someone's manuscript being fanfic until sold would not work for me if I were using the pro/amateur division line).

As for community = limited audience, though, hmm...I'm not sure whether that's actually true or not. In some cases, sure. But for example, emmagrant01 has said that she has a larger audience writing H/D than she would writing gay romance novels and I think that's probably true. She's writing in a huge fandom, gets tens of thousands of hits and hundreds of comments, compared to what would probably be a very niche seller were she to try to get published. (I, on the other hand, can hardly get fewer readers by repackaging my Jude/Ewan stories as original fiction, because the audience in fandom is very small.)

OMG I still haven't finished my remix fic! Must stop procrastinating. >_< How it is nearing 6am already!? *dashes*