I wouldn't be interested in reading a pure fiction storyhour - campaign based ones tend to have elements of wacky randomness that make them more appealing to me.
My story hour is almost entirely fiction, with a few "based on" elements taken from past campaigns and past players. My view is, put your work out there, and if people like it, they'll read it, if they don't... well, no harm done. I'd recommend just being clear in your first post what you're doing so that if people aren't interested they can steer clear.
I've (semi-) seriously considered dropping my players (who show up sporadically) and finishing up my story hour without them. The thing is, I'm not creative enough to pull it off. Damn those bastards, but I need them. The main thing is, I post the story hour about a game that I enjoy playing (I actually have players write it, but that's a different topic). Writing it alone would be fun, but the game is more fun.
Well, my story hour started out as campaign logs, but of late it's moved into the story format.
There's also Paka's excellent "Another Bastard Child of Tolkien" and Lazybone's "Travels through the Wild West", both of which use story format and both of which I highly recommend. (LB's is in fact purely a story with no campaign behind it.)
You mean game fiction, or simply fiction fiction? Seems like the latter could be found plenty of other places. There's tons of amateur scifi/fantasy writer newsgroups, list-serves, etc. already. Game fiction seems more appropriate, though given the focus of the site.
That sounds like game fiction, then. Sort of like the amateur, short-story version of FR novels. I'd love to see them. In fact, talking about it has made me think of writing some!