I love Firefly and I've found some fantastic fic for it. But I read River/Simon (non-incest) fic. Though I like the 'ships, they aren't my primary interest in the show. And I run from any Simon/Jayne or River/Jayne fic, so if that's your cup of tea, I can't help. Also, frequently people mark the story as being about River and Simon and don't put a warning that it's incest instead of a sibling relationship fic, so that can be very annoying.
