Kindle Boards, a new project is underway for a website that "matches" you to books based on criteria you set, beyond just genre and rating. (Seriously, go read through the forum thread and see how it's going!) Currently one coder is working on it, and is sending a plea for help from authors to add their books to the database so the search functions can be tested. All genres (including erotica) are welcome, so give it a spin! When this thing rolls out your book could be one of the first readers are stumbling upon!
They're also looking for a site title to use, but currently it's going by Match A Book. And yes, it's a pseudo-parody on dating sites. What are you waiting for? Spread the word, yo!