Nookie Notes (a project by Heather M Klaus) will be seeking M/F romantic erotica (genre erotic but in a strong romance context) first person short stories for a flat payment rate of $25.
It seems like they are going to be set up so members can customize the story to send to their lover. The current copy is heavily gendered in a way that strikes me as overly stereotyped. I am not sure I see a large market for this, but if payment is up front, the writer isn't really risking anything.
Maybe I am over-estimating the sophistication of the target audience"Soccer Mom" (her words, not mine).