http://www.sinister-attraction.net/attract.htm - It's own story system, one that looks at first glance to be difficult to parse at best, and most recent update appears to have been in 2004.
http://allaboutspike.com/ - Again, it's own story system, one perhaps not quite as bad as sinister-attraction, and most recent update in early 2006.
And both sites are officially closed to new stories. By our usual standards, these are very poor candidates.
I'm not interested in writing code to support them myself, but I will accept it into the project if somebody else does.