I currently maintain The Nabiki and Ranma Relationship Archive at NabikiandRanma.com. It is a fanfiction archive dealing with two characters from the anime series, Ranma 1/2. I am also currently working on building a Data driven version of the archive. You can check that out here. Send me an Email and let me know what you think.
Also I have recently launched The Rei and Usagi Relationship Archive at ReiandUsagi.com. Similar to the above, it is a fanfiction archive dealing with two characters from the anime series, SailorMoon. Specifically SailorMoon and SailorMars. It is a PHP4 front end sitting on top of a MySQL database.