Could also toss it in Finders and Keepers
( Elliquiy Role Playing Forums »
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Finders and Seekers)
which IS for any art that is not your own, for posting the doujin on it's own (not sure about hosting, but I think you could use the Wiki for it). But you can use the material in your search post(s) without any problem (if you want to base a game on the work). Just be sure to refer to the artist(s). Not doing so would fall under art theft.
Story writing would but need the same references as fan fics. Reference is the key, here.